Question 1

Write the formula for the conjugate base of H2PO4-.

Accepted Answer

Question 2

Identify the conjugate acid of HCO3- in the reaction HCO3- + HPO42-  →\rarr→  H2CO3 + PO43-

Accepted Answer

A)  H2O
B)  HCO3-
C)  H2CO3
D)  PO43-
E)  HPO42- F) B) and C)
G) A) and E)

Question 3

The pH of a 0.6 M solution of a weak acid is 4.0. What percent of the acid has ionized?

Accepted Answer

The answer of The pH of a 0.6 M solution...

Question 4

Acid strength decreases in the series HI > HSO4- > HF > HCN. Which of these anions is the weakest base?

Accepted Answer

A)  I-
B)  SO42-
C)  F-
D)  CN-E) A) and B)
F) A) and C)

Question 5

Which of these acids is stronger, H2SO4 or HSO4-?

Accepted Answer

Question 6

Calculate the pOH of a solution containing 0.25 g of HCl in 800. mL of solution.

Accepted Answer

The answer of Calculate the pOH of a solution containing...

Question 7

What is the pH of 10.0 mL of 0.0020 M HCl?

Accepted Answer

A)  0.70
B)  2.70
C)  3.70
D)  5.70
E)  10.0F) C) and D)
G) B) and E)

Question 8

Acid strength decreases in the series: strongest HSO4- > HF > HCN. Which of these species is the weakest base?

Accepted Answer

A)  HF
B)  SO42-
C)  F-
D)  CN-E) None of the above
F) All of the above

Question 9

Calculate the pH of 2.6 * 10-2 M KOH.

Accepted Answer

A)  12.41
B)  15.59
C)  2.06
D)  7.00
E)  1.59F) B) and D)
G) A) and E)

Question 10

Acid strength decreases in the series: HCl > HSO4- > HCN. Which of these species is the strongest base?

Accepted Answer

A)  CN-
B)  SO42-
C)  HCN
D)  Cl-E) B) and D)
F) B) and C)

Question 11

The pOH of a solution is 10.40. Calculate the hydrogen ion concentration in the solution.

Accepted Answer

A)  4.0* 10-11 M
B)  3.6 M
C)  4.0 * 10-10 M
D)  2.5 * 10-4 M
E)  1.8 * 10-4 MF) A) and E)
G) A) and D)

Question 12

Which one of these salts will form a neutral solution on dissolving in water?

Accepted Answer

A)  NaCl
B)  KNO2
C)  NaCN
D)  NH4NO3
E)  FeCl3F) A) and C)
G) A) and B)

Question 13

Predict the direction in which the equilibrium will lie for the reaction H2SO3(aq) + HCO3- (aq)  →\rarr→  HSO3-(aq) + H2CO3(aq) .
Ka1(H2SO3) = 1 * 10-2; Ka1(H2CO3) = 4.2 * 10-7

Accepted Answer

A)  to the right
B)  to the left
C)  in the middle D) A) and B)
E) None of the above

Question 14

Calculate the pH of a 3.5 * 10-3 M HNO3 solution.

Accepted Answer

A)  -2.46
B)  0.54
C)  2.46
D)  3.00
E)  3.46F) A) and B)
G) C) and D)

Question 15

Identify the conjugate acid of SO42- in the reaction CO32- + HSO4-  →\rarr→  HCO3- + SO42-

Accepted Answer

A)  CO32-
B)  HSO4-
C)  OH-
D)  H3O+
E)  SO42- F) A) and E)
G) B) and D)

Question 16

Calculate the pH of a solution containing 0.20 g of NaOH in 2,000. mL of solution.

Accepted Answer

The answer of Calculate the pH of a solution containing...

Question 17

The pH of a 0.02 M solution of an unknown weak base is 8.1. What is the pKb of the unknown base?

Accepted Answer

Question 18

Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.00 * 102 mL of solution.

Accepted Answer

A)  1.35
B)  2.35
C)  7.00
D)  11.65
E)  12.65F) B) and D)
G) B) and E)

Question 19

Which one of the following statements is true for a 0.1 M solution of a weak acid HA?

Accepted Answer

A)  The concentration of H+ is slightly greater than the concentration of A-.
B)  The pH equals 1.0.
C)  The concentration of H+ is exactly equal to the concentration of A-.
D)  The pH is less than 1.0.
E)  The concentration of H+ is slightly less than the concentration of A-.F) C) and D)
G) B) and E)

Question 20

Arrange the acids HOBr, HBrO3, and HBrO2 in order of increasing acid strength.

Accepted Answer

A)  HOBr 3 2
B)  HOBr 2 3
C)  HBrO2 3
D)  HBrO3 2
E)  HBrO3 2 < HOBrF) None of the above
G) B) and D)

Exam 16: Acids and Bases

The pH of a 0.6 M solution of a weak acid is 4.0. What percent of the acid has ionized?

Correct AnswerverifiedShow Answer

Acid strength decreases in the series: HCl > HSO4- > HCN. Which of these species is the strongest base?

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Identify the conjugate acid of SO42- in the reaction CO32- + HSO4- →\rarr→ HCO3- + SO42-

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The pOH of a solution is 10.40. Calculate the hydrogen ion concentration in the solution.

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Write the formula for the conjugate base of H2PO4-.

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Calculate the pOH of a solution containing 0.25 g of HCl in 800. mL of solution.

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Which one of the following statements is true for a 0.1 M solution of a weak acid HA?

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Arrange the acids HOBr, HBrO3, and HBrO2 in order of increasing acid strength.

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Which one of these salts will form a neutral solution on dissolving in water?

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Calculate the pH of 2.6 * 10-2 M KOH.

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Calculate the pH of a solution containing 0.20 g of NaOH in 2,000. mL of solution.

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Predict the direction in which the equilibrium will lie for the reaction H2SO3(aq) + HCO3- (aq) →\rarr→ HSO3-(aq) + H2CO3(aq) . Ka1(H2SO3) = 1 * 10-2; Ka1(H2CO3) = 4.2 * 10-7

Correct AnswerverifiedShow Answer

Identify the conjugate acid of HCO3- in the reaction HCO3- + HPO42- →\rarr→ H2CO3 + PO43-

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Acid strength decreases in the series: strongest HSO4- > HF > HCN. Which of these species is the weakest base?

Correct AnswerverifiedShow Answer

Acid strength decreases in the series HI > HSO4- > HF > HCN. Which of these anions is the weakest base?

Correct AnswerverifiedShow Answer

Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.00 * 102 mL of solution.

Correct AnswerverifiedShow Answer

Calculate the pH of a 3.5 * 10-3 M HNO3 solution.

Correct AnswerverifiedShow Answer

The pH of a 0.02 M solution of an unknown weak base is 8.1. What is the pKb of the unknown base?

Correct AnswerverifiedShow Answer

What is the pH of 10.0 mL of 0.0020 M HCl?

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Which of these acids is stronger, H2SO4 or HSO4-?

Correct AnswerverifiedShow Answer

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Acid strength decreases in the series: HCl > HSO₄^- > HCN. Which of these species is the strongest base?

Correct Answer
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Identify the conjugate acid of SO₄^2- in the reaction CO₃^2- + HSO₄^- $\rarr$ HCO₃^- + SO₄^2-

Correct Answer
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Write the formula for the conjugate base of H₂PO₄^-.

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Arrange the acids HOBr, HBrO₃, and HBrO₂ in order of increasing acid strength.

Correct Answer
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Calculate the pH of 2.6 * 10^-2 M KOH.

Correct Answer
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Predict the direction in which the equilibrium will lie for the reaction H₂SO₃(aq) + HCO₃^-(aq) $\rarr$ HSO₃^-(aq) + H₂CO₃(aq) . K_a1(H₂SO₃) = 1 * 10^-2; K_a1(H₂CO₃) = 4.2 * 10^-7

Correct Answer
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Identify the conjugate acid of HCO₃^- in the reaction HCO₃^- + HPO₄^2- $\rarr$ H₂CO₃ + PO₄^3-

Correct Answer
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Acid strength decreases in the series: strongest HSO₄^- > HF > HCN. Which of these species is the weakest base?

Correct Answer
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Acid strength decreases in the series HI > HSO₄^- > HF > HCN. Which of these anions is the weakest base?

Correct Answer
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Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.00 * 10² mL of solution.

Correct Answer
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Calculate the pH of a 3.5 * 10^-3 M HNO₃ solution.

Correct Answer
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The pH of a 0.02 M solution of an unknown weak base is 8.1. What is the pK_b of the unknown base?

Correct Answer
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Correct Answer
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Which of these acids is stronger, H₂SO₄ or HSO₄^-?

Correct Answer
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