Colorimetric Determination of the Equilibrium Constant for the Formation of a Complex lon How will you collect data for this experiment? in-person Part 1 Data (2pts) 4624 0.659 Analytical wavelength (nm) Solution A: Absorbance Solution B: Absorbance Solution C: Absorbance Solution D Absorbance 0.785 0.937 1.347 Part 2 Data (1pt) 0.772 Solution X: Absorbance Solution Y: Absorbance Solution Z Absorbance 1.028 0.983 Part 1 solutions Beaker 0.20 M Fe(NO3)3 (ml) 9.0x10 4 KSCN M (mL) 0.50 M HNO, (ML) А 10.00 3.00 7.00 B 10.00 4.00 6.00 С 10.00 5.00 5.00 D 10.00 6.00 4.00 E 5.00 0.00 5.00 Analytical Wavelength: 462 nm Part 2 solutions Beaker 0,010 M Fe(NO3)2 (ml) 0.0011 M KSCN (ML) х 7.00 3.00 Y 5.00 5.00 Z 3.00 7.00 1. Why it is important to use the Part 1 solutions in Part 1 and the Part2 solutions in Part 2? What would happen if the Part 2 Feat solution was used in Part 1 by mistake? Normal BIU BE ITY ots) 2. If the cuvette was wet and not properly rinsed before you analyzed your sample how would that affect the equilibrium constant you would be reporting for that sample? Normal BIU I

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Answer 1

If the cuvette was wet and not properly rinsed before analyzing a sample, it could cause an incorrect absorbance reading due to the presence of water or residue from previous solutions. This would affect the calculated equilibrium constant for that sample, making it less reliable and accurate.

1. It is important to use the Part 1 solutions in Part 1 and the Part 2 solutions in Part 2 because they have different concentrations and compositions. Part 1 solutions contain Fe(NO3)3 and KSCN, while Part 2 solutions contain Fe(NO3)2 and KSCN. If the Part 2 Fe(NO3)2 solution was used in Part 1 by mistake, it would affect the equilibrium constant because the Fe(NO3)2 and Fe(NO3)3 have different properties and would result in different complex ions forming.
2. If the cuvette was wet and not properly rinsed before analyzing the sample, it could affect the equilibrium constant reported for that sample. This is because water could interfere with the reaction and cause the absorbance to be higher or lower than expected, leading to inaccurate results. It is important to properly rinse the cuvette before each use to ensure accurate measurements.
In the colorimetric determination of the equilibrium constant for the formation of a complex ion, it is crucial to collect accurate absorbance data for each solution. This is done by measuring the absorbance of the solutions at the analytical wavelength (462 nm in this case) using a spectrophotometer.
It is important to use the Part 1 solutions in Part 1 and the Part 2 solutions in Part 2 because they have different concentrations of Fe(NO3)3, KSCN, and HNO3, which affect the formation of the complex ion and the absorbance readings. Using the Part 2 Fe(NO3)2 solution in Part 1 by mistake would result in incorrect absorbance data, leading to an inaccurate calculation of the equilibrium constant.
If the cuvette was wet and not properly rinsed before analyzing a sample, it could cause an incorrect absorbance reading due to the presence of water or residue from previous solutions. This would affect the calculated equilibrium constant for that sample, making it less reliable and accurate.

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Related Questions

a particular reaction has a δho value of -185. kj and δso of -145. j/mol k at 298 k. calculate δgo at 301. k in kj, assuming that δho and δso do not significantly change with temperature. (value ± 2)

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The δgo value at 301 K is approximately -141 kJ/mol, assuming that δho and δso do not significantly change with temperature.

To calculate δgo at 301 K, we need to use the formula:
δgo = δho - Tδso
Where δho is the enthalpy change, δso is the entropy change, T is the temperature in Kelvin, and δgo is the Gibbs free energy change.
Substituting the given values:
δho = -185. kJ/mol
δso = -145. J/mol K
T = 301 K
We need to convert δso from J/mol K to kJ/mol K by dividing it by 1000:
δso = -0.145 kJ/mol K
Now we can calculate δgo:
δgo = -185. kJ/mol - 301 K × (-0.145 kJ/mol K)
δgo = -185. kJ/mol + 43.645 kJ/mol
δgo = -141.355 kJ/mol
Therefore, the δgo value at 301 K is approximately -141 kJ/mol, assuming that δho and δso do not significantly change with temperature.
To calculate ΔG° at 301 K, we will use the Gibbs-Helmholtz equation: ΔG° = ΔH° - TΔS°. Given that ΔH° = -185 kJ and ΔS° = -145 J/mol·K, we can convert ΔS° to kJ/mol·K by dividing by 1000: -145 J/mol·K ÷ 1000 = -0.145 kJ/mol·K.
Now, let's substitute the values into the equation:
ΔG° = -185 kJ - (301 K × -0.145 kJ/mol·K)
ΔG° = -185 kJ + 43.645 kJ
ΔG° = -141.355 kJ
So, the ΔG° value at 301 K is approximately -141.4 kJ (± 2).

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how does sodium sulfate dry a solution intramolecular forces

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Sodium sulfate dry a solution intramolecular forces by attract and bind with water molecules.

Sodium sulfate is a salt that has the ability to absorb water molecules from a solution through a process called hydration. When sodium sulfate is added to a solution, it can attract and bind with water molecules, which decreases the amount of water present in the solution. This process is driven by the intramolecular forces between sodium ions and water molecules.

Intramolecular forces are the forces that exist between atoms within a molecule. In the case of sodium sulfate, the intramolecular forces between the sodium and sulfate ions are strong enough to allow them to attract and bind with water molecules. As a result, the water molecules become trapped within the crystal structure of the sodium sulfate, effectively removing them from the solution.

The removal of water from a solution can have several effects. It can increase the concentration of solutes in the solution, making it more viscous and less likely to freeze at low temperatures. It can also decrease the pH of the solution, as the water molecules that are removed often play a role in maintaining the pH balance.

Overall, the ability of sodium sulfate to dry a solution is due to its strong intramolecular forces, which allow it to attract and bind with water molecules. This process effectively removes water from the solution, resulting in a more concentrated and stable mixture.

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What is the pH of a 1 M solution of HSbF? pK,--12 Circle your choice and clearly show your work or justification below. a)-12 b) 0 c) 2d) 6e 12

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The pH of a 1 M solution of HSbF is 0 and, the correct answer is (b) 0.

For calculating the pH of a 1 M solution of HSbF, the given pK value of HSbF is -12.

This means that HSbF can act as a strong acid and will fully dissociate in water. The equation for the dissociation of HSbF in water is:

HSbF  +  H2O  →  SbF6-  +  H3O+

From this equation, we can see that one hydrogen ion (H+) is produced for every HSbF molecule that dissociates. Therefore, the concentration of H+ in the solution will be equal to the concentration of HSbF that dissociates.

If we assume that all of the HSbF in the solution dissociates (since it is a strong acid), then the concentration of H+ in the solution will be 1 M.

Using the equation for pH:

pH = -log[H+]

We can substitute the concentration of H+ to get:

pH = -log(1)

pH = 0

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Calculate the pH for each of the following solutions at 25°C.
(a) 0.14 M NH3 (Kb for NH3 = 1.8×10−5)
(b) 0.049 M C5H5N (pyridine). (Kb for pyridine = 1.7×10^−9)

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The pH of (a) 0.14 M NH₃ solution at 25°C is 11.12 and (b) 0.049 M C₅H₅N (pyridine) solution at 25°C is 9.25.

To calculate the pH for each solution, first find the pOH using the given Kb values and concentrations, then subtract the pOH from 14.

For (a) 0.14 M NH3:
1. Set up the Kb expression: Kb = [NH₄⁺][OH⁻] / [NH₃]
2. Use the ICE table (Initial, Change, Equilibrium) to find [OH⁻]
3. Solve for x (concentration of OH-) using the quadratic formula or approximation method
4. Calculate pOH = -log10[OH⁻]
5. Calculate pH = 14 - pOH

For (b) 0.049 M C₅H₅N (pyridine):
1. Set up the Kb expression: Kb = [C₅H₅NH⁺][OH⁻] / [C₅H₅N]
2. Use the ICE table to find [OH⁻]
3. Solve for x using the quadratic formula or approximation method
4. Calculate pOH = -log10[OH⁻]
5. Calculate pH = 14 - pOH

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koh is used to precipitate each of the cations from the respective solutions. determine the minimum hydroxide required for the precipitation to begin a. 0.015 m cacl2 ksp (ca(oh)2 ) = 4.68x10-6

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The minimum hydroxide concentration required for precipitation to begin is 5.58 x 10⁻³ M.

To determine the minimum hydroxide required for precipitation of Ca2+ from a solution of 0.015 M CaCl2, we need to use the solubility product constant (Ksp) of Ca(OH)2, which is 4.68x10-6.
The balanced chemical equation for the precipitation reaction is:
Ca2+ + 2OH- → Ca(OH)2
We can use stoichiometry to determine the amount of hydroxide required to precipitate all the Ca2+ ions. Since Ca(OH)2 has a 1:2 stoichiometric ratio with Ca2+, we need twice as much hydroxide as the amount of Ca2+ in the solution.
The concentration of Ca2+ in 0.015 M CaCl2 is also 0.015 M. Therefore, we can calculate the minimum amount of hydroxide required as follows:
Ksp = [Ca2+][OH-]2
4.68x10-6 = (0.015 M)(2[OH-])2
[OH-] = √(4.68x10-6 / 0.03)
[OH-] = 0.000228 M
Therefore, the minimum hydroxide required to precipitate all the Ca2+ ions from 0.015 M CaCl2 is 0.000228 M.
To determine the minimum hydroxide (OH⁻) concentration required for precipitation to begin for a 0.015 M CaCl₂ solution, you'll need to use the Ksp value for Ca(OH)₂, which is 4.68 x 10⁻⁶.
First, write the balanced equation for the reaction:
Ca²⁺ + 2OH⁻ → Ca(OH)₂
Now, set up the Ksp expression:
Ksp = [Ca²⁺][OH⁻]²
Plug in the given values and solve for [OH⁻]:
4.68 x 10⁻⁶ = (0.015)([OH⁻]²)
Divide both sides by 0.015:
[OH⁻]² = 3.12 x 10⁻⁵
Now, take the square root to find [OH⁻]:
[OH⁻] = 5.58 x 10⁻³ M
The minimum hydroxide concentration required for precipitation to begin is 5.58 x 10⁻³ M.

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Sulfuric acid is essential to dozens of important industries from steelmaking to plastics and pharmaceuticals. More sulfuric acid is made than any other industrial chemical, and world production exceeds 2. 0 x 10" kg per year. The first step in the synthesis of sulfuric acid is usually burning solid sulfur to make sulfur dioxide gas. Suppose an engineer studying this reaction introduces 4. 8 kg of solid sulfur and 10. 0 atm of oxygen gas at 550. °C into an evacuated 75. 0 L tank. The engineer believes K. = 3. 7 for the reaction at this temperature. Calculate the mass of solid sulfur she expects to be consumed when the reaction reaches equilibrium. Round your answer to 2 significant digits. Note for advanced students: the engineer may be mistaken in her belief about the value of K, and the consumption of sulfur you calculate may not be what she actually observes. "

Answers

The expected mass of solid sulfur consumed at equilibrium is 1.6 kg.

The balanced chemical equation for the reaction is:

S(s) + O₂(g) ⇌ SO₂(g)

The equilibrium constant expression for this reaction is:

K = [SO₂]/[S][O₂]

where [SO₂], [S], and [O₂] are the molar concentrations of SO₂, S, and O₂ at equilibrium.

Given the initial conditions of the reaction and the equilibrium constant, we can set up an ICE (initial, change, equilibrium) table and solve for the equilibrium concentrations of the species:

S(s) + O₂(g) ⇌ SO₂(g)
I 4.8 kg 10.0 atm 0

C -x -x +x

E 4.8-x 10.0-x x

Using the ideal gas law, we can convert the partial pressure of oxygen to the molar concentration:

[P(O₂)]/[RT/V] = n(O2)/V

[10.0 atm]/[(0.08206 L·atm/K·mol)(550°C + 273.15 K)/75.0 L] = n(O₂)/75.0 L

n(O₂) = 0.261 mol

Substituting the equilibrium concentrations into the equilibrium constant expression and solving for x, we get:

K = [SO₂]/[S][O₂]

3.7 = x/(4.8-x)(0.261)

x = 1.6 kg

As a result, the mass of solid sulphur consumed at equilibrium is 1.6 kg.

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a volume of 3.0 l of air at 36°c is expelled from the lungs into cold surroundings at 1.6°c. what volume (in l) does the expelled air occupy at this temperature?

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So, the volume of the expelled air at 1.6°C is approximately 2.67 liters.

How to calculate the volume of air at a particular temperature?

To calculate the volume of the expelled air at 1.6°C, we can use Charles' Law, which states that the volume of a gas is directly proportional to its temperature, provided that the pressure and the amount of gas remain constant. The formula for Charles' Law is:

V1/T1 = V2/T2

where V1 is the initial volume, T1 is the initial temperature, V2 is the final volume, and T2 is the final temperature. In this case:

V1 = 3.0 L
T1 = 36°C + 273.15 = 309.15 K (convert to Kelvin)
V2 = ? (we need to find this)
T2 = 1.6°C + 273.15 = 274.75 K (convert to Kelvin)

Now, we can rearrange the formula and solve for V2:

V2 = V1 * (T2/T1)
V2 = 3.0 L * (274.75 K / 309.15 K)

V2 ≈ 2.67 L

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what will be the ph of a buffer solution containing an acid with a pka of 7.3 with an acid concentration equivalent to that of its conjugate base?

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The pH of a buffer solution containing an acid with a pKa of 7.3 and an acid concentration equivalent to that of its conjugate base is 7.3. This can be calculated using the Henderson-Hasselbalch equation.

If a buffer solution contains an acid with a pKa of 7.3 and an acid concentration equivalent to that of its conjugate base, the pH of the buffer solution can be calculated using the Henderson-Hasselbalch equation:

[tex]pH = pKa + log([A-]/[HA])[/tex]

Where:

pKa = 7.3 (given)

[A-] = concentration of the conjugate base (equal to the concentration of the acid)

[HA] = concentration of the acid

Since the acid concentration is equivalent to that of its conjugate base, [tex][A-]/[HA] = 1[/tex]

Therefore:

pH = 7.3 + log(1)

pH = 7.3

So, the pH of the buffer solution would be 7.3.

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How would the volume be changing if the pressure were decreasing?does this demonstrate a direct or inverse proportion?

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The  volume would increase if the pressure were decreasing. This demonstrates an inverse proportion.

According to Boyle's law, "The final pressure of a gas is inversely proportional to the change in volume  of the gas at constant temperature and number of moles."

This law is represented as

P∝ 1/V

or PV= constant.

Let us consider a closed container containing gas,  if the pressure exerted on the gas is increased the gas molecules will become compressed and will become small is volume as compared to the volume occupied by the molecules before increasing the pressure, where they were moving apart from each other randomly.

On the other hand, volume is directly proportional to the temperature of the gas at constant pressure and number of moles. This is Charles's law.

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Consider the titration of 50.0 mL of 0.116 M NaOH with 0.0750 M HCl. Calculate the pH after the addition of each of the following volumes of acid:
(a) 5.0 mL (b) 50 mL (c) 0.10 L

Answers

The pH after the addition of each volume of acid is: (a) 11.72, (b) 3.15, (c) 2.28.

The reaction between NaOH and HCl is a neutralization reaction, which produces NaCl and H2O. In this reaction, the acid (HCl) reacts with the base (NaOH) to form water and a salt.

To calculate the pH after the addition of each volume of acid, we need to use the stoichiometry of the reaction and the Henderson-Hasselbalch equation. The initial concentration of NaOH is 0.116 M, and the initial volume is 50.0 mL. The volume of HCl added at each step is:

(a) 5.0 mL: The total volume is 55.0 mL. The number of moles of HCl added is 0.0750 M x 0.0050 L = 3.75 x 10^-4 mol. The number of moles of NaOH is 0.116 M x 0.0500 L = 5.80 x 10^-3 mol. After the reaction, the number of moles of NaOH remaining is 5.80 x 10^-3 mol - 3.75 x 10^-4 mol = 5.43 x 10^-3 mol.

The concentration of NaOH is 5.43 x 10^-3 mol / 0.055 L = 0.099 M. The pH is calculated using the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]), where pKa is the dissociation constant of water (14), [A-] is the concentration of the conjugate base (Na+), and [HA] is the concentration of the acid (H2O).

The pH after the addition of 5.0 mL of HCl is 11.72.

(b) 50 mL: The total volume is 100.0 mL. The number of moles of HCl added is 0.0750 M x 0.0500 L = 3.75 x 10^-3 mol. The number of moles of NaOH is 0.116 M x 0.0500 L = 5.80 x 10^-3 mol. After the reaction, the number of moles of HCl remaining is 3.75 x 10^-3 mol - 5.80 x 10^-3 mol = -2.05 x 10^-3 mol.

The concentration of HCl is -2.05 x 10^-3 mol / 0.100 L = -0.0205 M (negative because there is excess base). The pH is calculated using the Henderson-Hasselbalch equation, and the pH after the addition of 50 mL of HCl is 3.15.

(c) 0.10 L: The total volume is 150.0 mL. The number of moles of HCl added is 0.0750 M x 0.1000 L = 7.50 x 10^-3 mol. The number of moles of NaOH is 0.116 M x 0.0500 L = 5.80 x 10^-3 mol. After the reaction, the number of moles of HCl remaining is 7.50 x 10^-3 mol - 5.80 x 10^-3 mol = 1.70 x 10^-3 mol. The concentration of HCl is 1.70 x 10^-3 mol / 0.

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Which pair of species will react under standard conditions at 25 °C? X+ and Y. Use electrical measurements of chemical systems for analytical purposes:.

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The pair of species X+ and Y will react under standard conditions at 25°C if their combined standard electrode potentials (E°) result in a positive overall cell potential (ΔE°).



To determine if species X+ and Y will react under standard conditions at 25°C, you need to follow these steps:

1. Identify the half-reactions for each species (X+ and Y).
2. Look up the standard electrode potentials (E°) for each half-reaction in a table of standard reduction potentials.
3. Determine the overall cell potential (ΔE°) by subtracting the E° of the half-reaction being oxidized from the E° of the half-reaction being reduced (ΔE° = E°reduction - E°oxidation).
4. If the overall cell potential (ΔE°) is positive, the reaction will be spontaneous under standard conditions at 25°C, and the species X+ and Y will react.
5. Electrochemical measurements can be employed to analyze chemical systems, by determining the spontaneity of the reaction and monitoring the progress of the reaction.

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All of the following ground-state electron configurations are correct except a. cu:[ar] 4s13d10 b. in:[kr]5s24d105p1 c. ca:[ar]4s2 d. i:[kr]5s24d105p5 e. fe:[ar]4s23d5

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All of the following ground-state electron configurations are correct except  Cu:[Ar] 4s¹3d¹⁰.(A)

Copper (Cu) has an anomalous electron configuration, which results from the half-filled 4s and fully-filled 3d subshells being more stable.

Therefore, the correct ground-state electron configuration for Cu should be [Ar] 4s²3d⁹, not [Ar] 4s¹3d¹⁰.

The rest of the electron configurations (b. In:[Kr]5s²4d¹⁰5p¹, c. Ca:[Ar]4s², d. I:[Kr]5s²4d¹⁰5p⁵, and e. Fe:[Ar]4s²3d⁵) are correct for their respective elements, as they follow the general rules for filling electron orbitals in the periodic table.(A)

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what is the ph of a 0.2-m solution of acetic acid (ka = 1.75x10-5). give the answer in two sig. figs.

Answers

To calculate the pH of a 0.2 M solution of acetic acid, we need to use the dissociation equation of acetic acid:

[tex]CH_{3} COOH[/tex]⇌ [tex]CH_{3} COO^{-} + H^{+}[/tex]

The equilibrium constant expression for this reaction is:

Ka = [[tex]CH_{3} COO^{-}[/tex]][[tex]H^{+}[/tex]] / [[tex]CH_{3} COOH[/tex]]

At equilibrium, we can assume that [[tex]CH_{3} COO^{-}[/tex]] ≈ [[tex]H^{+}[/tex]], since the dissociation of acetic acid is relatively small. Therefore, we can simplify the equation as:

Ka = [tex][H^{+} ]^2[/tex] / [[tex]CH_{3} COOH[/tex]]

Rearranging this equation gives:

[tex][H^{+} ]^2[/tex] = sqrt(Ka * [[tex]CH_{3} COOH[/tex]])

We are given that the concentration of acetic acid is 0.2 M. Substituting this value and the given Ka value, we get:

[[tex]H^{+}[/tex]] = sqrt(1.75 x [tex]10^{-5}[/tex] * 0.2) = 0.0026 M

Taking the negative logarithm of this value gives the pH:

pH = -log[[tex]H^{+}[/tex]] = -log(0.0026) = 2.59

Therefore, the pH of a 0.2 M solution of acetic acid with a Ka value of 1.75 x [tex]10^{-5}[/tex] is 2.59, which should be rounded to two significant figures, giving a final answer of pH = 2.6.

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What is the percent dissociation of 0.40 M butyric acid (HC4H,O2, K 148 x 10-? A. 0.24% B. 0.96% C. 6.1x10-3% D. 3.7x10-3% E. 0.61%

Answers

The percent dissociation of 0.40 M butyric acid (HC4H7O2) is approximately 0.24%. The correct option is A. To determine the percent dissociation of 0.40 M butyric acid (HC4H7O2), we first need to calculate the concentration of dissociated ions using the given Ka value (1.48 x 10^-5).

Step 1: Set up the equilibrium expression:
Ka = [C4H7O2-][H+]/[HC4H7O2]

Step 2: Assume a small amount (x) of HC4H7O2 dissociates into ions:
1.48 x 10^-5 = (x)(x)/(0.40 - x)

Step 3: Solve for x (the concentration of dissociated ions) using the quadratic formula or approximations (since Ka is small, x is also small, so we can assume 0.40 - x ≈ 0.40):
x ≈ √(1.48 x 10^-5 * 0.40) ≈ 9.62 x 10^-4 M

Step 4: Calculate the percent dissociation:
Percent dissociation = (x / initial concentration) * 100
Percent dissociation = (9.62 x 10^-4 / 0.40) * 100 ≈ 0.24%.

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11. when a 1.0 m aqueous solution of nai is electrolyzed, what is the initial product formed at the cathodeand at the anode?

Answers

2NaI + 2H₂O → 2Na + I2 + O₂ + 4H+ + 4I-  is the initial product formed at the cathodeand at the anode

When a 1.0 M aqueous solution of NaI is electrolyzed, the initial product formed at the cathode and at the anode will depend on the applied voltage and the nature of the electrodes used.

Assuming that inert electrodes, such as platinum electrodes, are used and the applied voltage is sufficient to overcome the activation energy for the reduction and oxidation reactions, the initial products formed will be:

At the cathode: Sodium ions (Na+) will be reduced to form metallic sodium (Na) and iodide ions (I-) will not be reduced. Therefore, the initial product formed at the cathode will be metallic sodium (Na).

2Na+ + 2e- → 2Na (cathode)

At the anode: Iodide ions (I-) will be oxidized to form elemental iodine (I₂) and water (H₂O) will be oxidized to form oxygen gas (O₂) and hydrogen ions (H+). The dominant product will depend on the concentration of iodide ions relative to water. If the iodide ion concentration is high, then iodine will be the main product, and if the water concentration is high, then oxygen gas will be the main product.

2I- → I2 + 2e- (anode)

2H₂O → O₂ + 4H+ + 4e- (anode)

Overall reaction:

2NaI + 2H₂O → 2Na + I2 + O₂ + 4H+ + 4I-

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In heavy exercise, CO2 accumulates due to increased respiration. As a result:A.blood [H+] increases and pH decreases.B.blood [H+] increases and pH increases.C.blood [H+] decreases and pH decreases.D. blood [H+] decreases and pH increases.

Answers

In heavy exercise, CO₂ accumulates due to increased respiration, causing blood [H⁺] to increase and pH to decrease (Option A).

During heavy exercise, the body's demand for oxygen increases, leading to a rise in respiration. This results in an accumulation of carbon dioxide (CO₂) in the bloodstream.

CO₂ reacts with water to form carbonic acid (H₂CO₃), which then dissociates into hydrogen ions (H⁺) and bicarbonate ions (HCO₃⁻). As the concentration of H⁺ ions increases, the pH level of the blood decreases, becoming more acidic.

This process is vital for maintaining the body's acid-base balance, and the respiratory system and kidneys work together to remove excess CO₂ and H⁺ ions to restore blood pH to its normal range.(A)

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determine the maximum number of moles of pbcl3 that can be producedfrom a mixture of .4 mol and .5 mol cl2

Answers

The limiting reagent in the reaction, which can only create 0.4 mol of PbCl3, limits the amount of that metal that can be produced.

The reaction between Pb and Cl2 has the following balanced equation:

2Cl2 + Pb = PbCl4

The limiting reagent is the one that runs out first since the reaction needs 2 moles of Cl2 for every 1 mole of Pb. Because it is present in the smallest amount (0.4 mol) while Cl2 is present in excess (0.5 mol), Pb is the limiting reagent in this instance. Therefore, even though there is more than enough Cl2 to react with all of the Pb, only 0.4 mol of PbCl3 can be generated. Since the reaction needs two moles of Cl2 for every one mole of Pb, the limiting reagent will be the one that runs out first. Pb is the limiting reagent in this instance because it is present in the smallest concentration (0.4 mol), whereas Cl2 is present in excess (0.5 mol). Even though there is more than enough Cl2 for all of the Pb to react, only 0.4 mol of PbCl3 can be created as a result.

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in your understanding, do you think that the following statement is correct: "water is an effective solvent for living systems because of its inert behavior"? why or why not? explain your answer.

Answers

"Water is an effective solvent for living systems because of its inert behavior" is not entirely accurate.

What are the properties of water?

Water is considered an effective solvent for living systems because of its ability to dissolve various types of molecules such as salts, sugars, and proteins. This is due to the polarity of water molecules and the hydrogen bonding between them. Additionally, water is not completely inert as it can participate in chemical reactions, such as hydrolysis and dehydration synthesis. Therefore, it is the combination of water's polarity and reactivity that make it an effective solvent for living systems. These characteristics make water a crucial component in living systems, as it can facilitate various biochemical reactions and transport essential nutrients and waste materials.

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What is the net ionic equation of the reaction of MgSO4 with Sr(NO3)2? Express you answer as a chemical equation including phases.
I have tried this several times myself and it has told me my answers are wrong, here were my answers,
SO2−4(aq)+Sr2+(aq)→SrSO4(s)
SO4(aq)2−+Sr2+(aq)→SrSO4(s)
Sr2+(aq)+SO4(aq)2−→SrSO4(s)

Answers

The net ionic equation for the reaction of MgSO4 with Sr(NO3)2 is:
SO42-(aq) + Sr2+(aq) → SrSO4(s)

The net ionic equation of the reaction of MgSO4 with Sr(NO3)2 can be determined by writing the balanced chemical equation and then canceling out the spectator ions that appear on both the reactant and product sides of the equation.

The balanced chemical equation for the reaction is:

MgSO4(aq) + Sr(NO3)2(aq) → Mg(NO3)2(aq) + SrSO4(s)

To write the net ionic equation, we must first identify the ions that are involved in the reaction. In this case, the aqueous solutions contain Mg2+, SO42-, Sr2+, and NO3-.

The spectator ions, which do not participate in the reaction, are Mg2+ and NO3-. Therefore, we can cancel them out to write the net ionic equation as:

SO42-(aq) + Sr2+(aq) → SrSO4(s)

This equation shows the ions that are involved in the reaction and the formation of the solid precipitate SrSO4. The phases for the different species are also included in the equation.

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The net ionic equation for the reaction of MgSO4 with Sr(NO3)2 is:
SO42-(aq) + Sr2+(aq) → SrSO4(s)

The net ionic equation of the reaction of MgSO4 with Sr(NO3)2 can be determined by writing the balanced chemical equation and then canceling out the spectator ions that appear on both the reactant and product sides of the equation.

The balanced chemical equation for the reaction is:

MgSO4(aq) + Sr(NO3)2(aq) → Mg(NO3)2(aq) + SrSO4(s)

To write the net ionic equation, we must first identify the ions that are involved in the reaction. In this case, the aqueous solutions contain Mg2+, SO42-, Sr2+, and NO3-.

The spectator ions, which do not participate in the reaction, are Mg2+ and NO3-. Therefore, we can cancel them out to write the net ionic equation as:

SO42-(aq) + Sr2+(aq) → SrSO4(s)

This equation shows the ions that are involved in the reaction and the formation of the solid precipitate SrSO4. The phases for the different species are also included in the equation.

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Draw the products of homolysis or heterolysis of the below indicated bond. Use electronegativity differences to decide on the location of charges in the heterolysis reaction. Classify the given carbon reactive intermediate as a radical, carbocation, or carbanion.

Answers

A reactive intermediate is a short-lived, a chemical reaction and participates in subsequent steps. Its charge and electron configuration, a reactive intermediate can be classified as a radical, carbocation, or carbanion.


Homolysis refers to the breaking of a bond in a molecule such that each of the two resulting fragments retains one of the two electrons from the bond. This can result in the formation of two radicals, which are highly reactive species with an unpaired electron.
Heterolysis, on the other hand, refers to the breaking of a bond in a molecule such that one of the two resulting fragments retains both electrons from the bond, while the other fragment is left with none. This can result in the formation of a cation (if the fragment that retains the electrons has a positive charge) or an anion (if the fragment that retains the electrons has a negative charge).
Electronegativity is a measure of an atom's ability to attract electrons towards itself in a covalent bond. The greater the electronegativity difference between two atoms in a bond, the more polar the bond is, and the more likely it is to undergo heterolytic cleavage.
A radical has an unpaired electron and is neutral, while a carbocation is positively charged and has an empty orbital, and a carbanion is negatively charged and has a lone pair of electrons.

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Give the approximate bond angle for a molecule with a linear shape. Select one: a. 105 b. 109.5 C. 120 d. 180 e. 90

Answers

Answer:

d. 180°

Explanation:

Linear means flat, and flat means that it makes a perfect angle of 180°!

What is the bond order of the C-O bonds in the carbonate ion ? (enter a decimal number) In which species (CO32 or CO2) are the C-O bond(s) longer?| In which species (CO32 or CO2) are the C-O bond(s) weaker?

Answers

The C-O bonds in the carbonate ion (CO₃²⁻) have a bond order of 1.33, are longer compared to the C-O bonds in CO₂, and are weaker due to the presence of the additional negative charge on the carbonate ion.

The carbonate ion (CO₃²⁻) has three C-O bonds, each with a bond order of 1.33. The bond order is calculated as the difference between the number of bonding electrons and the number of antibonding electrons, divided by 2. In the carbonate ion, there are four bonding electrons and two antibonding electrons, resulting in a bond order of 1.33 for each C-O bond.

In terms of bond length, the C-O bonds in CO₃²⁻ are longer than the C-O bonds in CO₂. This is because the carbonate ion has a larger molecular size and more electron density, leading to longer bond lengths compared to the smaller CO₂ molecule.

In terms of bond strength, the C-O bonds in CO₃²⁻ are weaker than the C-O bonds in CO₂. This is due to the presence of an additional negative charge on the carbonate ion, which increases the electron density around the C-O bonds and reduces their strength. The increased electron density in the carbonate ion also leads to increased repulsion between the negatively charged oxygen atoms, further weakening the C-O bonds.

In contrast, in CO₂, the absence of the additional negative charge and the smaller molecular size result in stronger C-O bonds compared to CO₃²⁻.

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calculate the number of grams of solute in 422.0 ml of 0.205 m calcium acetate.

Answers

The number of grams of solute in 422.0 mL of 0.205 M calcium acetate is approximately 13.68 grams.

To calculate the number of grams of solute in 422.0 mL of 0.205 M calcium acetate:

1. Convert the volume of the solution from mL to L:
422.0 mL × (1 L / 1000 mL) = 0.422 L

2. Use the molarity formula to find moles of solute:
Molarity (M) = moles of solute / liters of solution
0.205 M = moles of solute / 0.422 L
moles of solute = 0.205 M × 0.422 L = 0.08651 mol

3. Determine the molar mass of calcium acetate (Ca(C2H3O2)2):
Ca: 1 × 40.08 g/mol = 40.08 g/mol
C: 4 × 12.01 g/mol = 48.04 g/mol
H: 6 × 1.01 g/mol = 6.06 g/mol
O: 4 × 16.00 g/mol = 64.00 g/mol
Molar mass = 40.08 + 48.04 + 6.06 + 64.00 = 158.18 g/mol

4. Calculate the mass of solute in grams:
Mass = moles of solute × molar mass
Mass = 0.08651 mol × 158.18 g/mol = 13.68 g

Therefore approximately 13.68 grams is the number of grams of solute in 422.0 mL of 0.205 M calcium acetate.

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A) Calculate Kc for the reaction below.I2(g)⇌2I(g)Kp=6.26×10−22 (at 298 K)B) Calculate Kc for the reaction below.CH4(g)+H2O(g)⇌CO(g)+3H2(g)Kp=7.7×1024 (at 298 K)C) Calculate Kc for the reaction below.I2(g)+Cl2(g)⇌2ICl(g)Kp=81.9 (at 298 K)

Answers

A) To find Kc, we need to use the relationship Kp = Kc(RT)^(Δn), where Δn is the difference in moles between the products and reactants. For the reaction I2(g)⇌2I(g), Δn = 2 - 1 = 1, since there is one mole of gas on the reactant side and two moles of gas on the product side. Therefore, we have:

Kc = Kp/RT^(Δn)

Kc = (6.26×10^(-22))/(8.314 J/K/mol × 298 K)^(1)

Kc = 2.35×10^(-26)

B) For the reaction CH4(g)+H2O(g)⇌CO(g)+3H2(g), Δn = (1+1) - (1+3) = -2, since there are two moles of gas on the reactant side and four moles of gas on the product side. Therefore, we have:

Kc = Kp/RT^(Δn)

Kc = (7.7×10^(24))/(8.314 J/K/mol × 298 K)^(-2)

Kc = 5.6×10^(5)

C) For the reaction I2(g)+Cl2(g)⇌2ICl(g), Δn = (2+0) - (0+2) = 0, since there are two moles of gas on both the reactant and product sides. Therefore, we have:

Kc = Kp/RT^(Δn)

Kc = 81.9/((8.314 J/K/mol × 298 K)^(0))

Kc = 81.9

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PLEASEE
Explain the relationship between electrons and protons in a positive ion.

Answers

Answer:

In a positive ion, the number of electrons are less than the number of protons.

Explanation:

Answer:

A positive ion, also known as a cation, is formed when an atom loses one or more electrons. Electrons are negatively charged particles that orbit the nucleus of an atom. The nucleus contains positively charged particles called protons and neutral particles called neutrons.

In a neutral atom, the number of electrons is equal to the number of protons. When an atom loses one or more electrons, the balance between the number of protons and electrons is disrupted. Since there are now more protons than electrons, the atom becomes positively charged and is now a cation.

For example, when a sodium atom (Na) loses one electron, it becomes a sodium cation (Na+). The sodium atom has 11 protons and 11 electrons. When it loses one electron, it now has 11 protons and 10 electrons. Since there is one more proton than an electron, the sodium cation has a charge of +1.

sketch the lewis structures for the acid and base forms of 2-naphthol.

Answers

2-naphthol, also known as β-naphthol, is a compound that exists in both an acidic and basic form. The acid form has a phenolic hydroxyl group, which can act as a proton donor, while the base form has a deprotonated hydroxyl group.

The Lewis structure of the acid form of 2-naphthol shows the phenolic hydroxyl group (-OH) attached to the aromatic ring of naphthalene. This hydroxyl group forms a hydrogen bond with the neighboring oxygen atom in the ring. The Lewis structure of the base form of 2-naphthol shows the deprotonated hydroxyl group (-O-) attached to the ring. The negative charge on the oxygen is delocalized over the ring, making it more stable.

To draw the Lewis structures of the acid and base forms of 2-naphthol, start by drawing the skeletal structure of the naphthalene ring. Next, add the hydroxyl group (-OH) in the acid form or the deprotonated hydroxyl group (-O-) in the base form. Finally, add any lone pairs of electrons or charges to satisfy the octet rule and maintain charge neutrality.

Overall, the Lewis structures for the acid and base forms of 2-naphthol show the different protonation states of the phenolic hydroxyl group and their effect on the electron density of the naphthalene ring.

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Given the following balanced equation, determine the rate of reaction with respect to the [NOCl]. If the rate of Cl2 loss is 4.84 * 10-2 M/s, what is the rate of formation of NOCl?2 NO (g) + Cl 2 (g) -----> 2 NOCL (g)

Answers

The rate of formation of NOCl, given the rate of [tex]Cl_2[/tex] loss as 4.84 * [tex]10^{-2[/tex] M/s, is: 9.68 * [tex]10^{-2[/tex]M/s.

Determine the rate of reaction with respect to [NOCl]. Given the balanced equation:
2 NO (g) + [tex]Cl_2[/tex] (g) → 2 NOCl (g)

The rate of Cl2 loss is 4.84 * [tex]10^{-2[/tex] M/s. To find the rate of formation of NOCl, we need to compare the stoichiometric coefficients of [tex]Cl_2[/tex] and NOCl in the balanced equation.

Step 1: Identify the stoichiometric coefficients
For [tex]Cl_2[/tex], the coefficient is 1, and for NOCl, the coefficient is 2.

Step 2: Calculate the rate of formation of NOCl
Since the coefficient ratio between NOCl and [tex]Cl_2[/tex] is 2:1, the rate of formation of NOCl is twice the rate of [tex]Cl_2[/tex] loss.

Rate of NOCl formation = 2 * (Rate of [tex]Cl_2[/tex] loss)
Rate of NOCl formation = 2 * (4.84 * [tex]10^{-2[/tex] M/s)

Step 3: Compute the result
Rate of NOCl formation = 9.68 * [tex]10^{-2[/tex] M/s

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determine whether each of the following compounds is a molecular (covalent) compound or an ionic compound. how can you tell?

Answers

Carbon tetraiodide and PBr3 are covalent molecule whereas KBr and Iron (III) Oxide are ionic molecule.

When two non-metals or one non-metal are joined together by sharing a pair of electrons, the resulting combination is called a covalent compound.

Because phosphorus contains three valence electrons in its outer shell and is located in column 3 of the periodic table, PBr3 is covalent. As a result, both the elements in Carbon Tetraiodide—carbon and iodide—are non-metals, making them covalent compounds.

Due to the interaction between a metal and a non-metal, KBr and Iron (III) Oxide are both Iron (III) Oxides. From positively charged to negatively charged atoms, they will transfer the electrons.

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The complete question is

Determine whether each of the following compounds is a molecular compound or an ionic compound. How can you tell?

a. ) PBr₃

b. ) KBr

c. ) Iron (III) Oxide

d. ) Carbon Tetraiodide

what is the charge of the complex formed by a chromium(iii) metal ion coordinated to six water molecules?

Answers

A chromium(III) metal ion coordinated to six water molecules results in a complex with a +3 charge.

How do water molecules and chromium combine to generate complex ions?

Hydrogen ions are eliminated from the water ligands bound to the chromium ion by hydrogenoxide ions (from, instance, sodium hydroxide solution). Three of the water molecules must have a hydrogen ion removed in order to create a complex with no charge, or a neutral complex. This forms a precipitate because it is insoluble in water.

A chromium(III) metal ion coordinated to six water molecules results in a complex with a +3 charge. The complex is also referred to as hexaaquachromium(III) ion and is represented by the symbol [Cr(H2O)6]3+.

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aspirin (10.0 g) was saponified with naoh. after workup, 8.5 g of crude salicylic acid was isolated. the product was further purified and only 5.0 g were isolated. calculate the final percent yield.
a. 1105
b. 153%
c. 90%
d. 65%

Answers

The final percent yield is approximately 65%, which corresponds to option d. 65%.

To calculate the final percent yield, we'll follow these steps:
1. Calculate the theoretical yield of salicylic acid from aspirin.
2. Calculate the percent yield using the actual yield (5.0 g) and theoretical yield.

1. Theoretical yield:
Aspirin (C9H8O4) has a molecular weight of 180.16 g/mol, and salicylic acid (C7H6O3) has a molecular weight of 138.12 g/mol.

First, find the moles of aspirin:
10.0 g aspirin * (1 mol aspirin / 180.16 g aspirin) = 0.0555 mol aspirin

Now, use the stoichiometry to find the moles of salicylic acid:
0.0555 mol aspirin * (1 mol salicylic acid / 1 mol aspirin) = 0.0555 mol salicylic acid

Finally, find the theoretical yield of salicylic acid:
0.0555 mol salicylic acid * (138.12 g salicylic acid / 1 mol salicylic acid) = 7.67 g salicylic acid

2. Percent yield:
Percent yield = (actual yield / theoretical yield) * 100
Percent yield = (5.0 g / 7.67 g) * 100 = 65.19%

So, the final percent yield is approximately 65%, which corresponds to option d. 65%.

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