Question 1

The pH of a certain solution is 2.0. How many H+(aq)ions are there in 1.0 L of the solution?

Accepted Answer

A) 0.01 ions 
B) 100 ions 
C) 2 ions 
D) 6.* 1021 ions 
E) 6.* 1023 ions 
A) 0.01 ions 
B) 100 ions 
C) 2 ions 
D) 6.* 1021 ions 
E) 6.* 1023 ions

Question 2

In comparing three solutions with pH's of 2.0, 4.8, and 5.2, which is most acidic?

Accepted Answer

The soluti

Question 3

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

Question 4

Identify the conjugate base of HCO3- in the reaction CO32- + HSO4-   HCO3- + SO42-

Accepted Answer

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

Question 5

The pH of coffee is approximately 5.0. How many times greater is the [H3O+] in coffee than in tap water having a pH of 8.0?

Accepted Answer

A) 0.62 
B) 1.6 
C) 30 
D) 1,000 
E) 1.0 * 104 
A) 0.62 
B) 1.6 
C) 30 
D) 1,000 
E) 1.0 * 104

Question 6

Calculate the hydrogen ion concentration in a solution having a pH of 4.60.

Accepted Answer

A) 4.0 * 10-3 M 
B) 4.0 * 10-9 M 
C) 4.0 * 10-10 M 
D) 2.5 * 10-5 M 
E) 2.5 * 10-4 M 
A) 4.0 * 10-3 M 
B) 4.0 * 10-9 M 
C) 4.0 * 10-10 M 
D) 2.5 * 10-5 M 
E) 2.5 * 10-4 M

Question 7

If the pH of pure water is 7.0, what is the hydroxide ion concentration in pure water?

Accepted Answer

1 * 10<sup

Question 8

The pH of tomato juice is about 4.5. Calculate the concentration of hydrogen ions in this juice.

Accepted Answer

A) 3.* 10-10 M 
B) 3.* 10-5 M 
C) 5.* 10-4 M 
D) 4.M 
E) 3.* 1010 M 
A) 3.* 10-10 M 
B) 3.* 10-5 M 
C) 5.* 10-4 M 
D) 4.M 
E) 3.* 1010 M

Question 9

Which of these lists of molecules is arranged in order of increasing acid strength?

Accepted Answer

A) H2S 2O 2Se 
B) H2O 2S 2Se 
C) H2Se 2O 2S 
D) H2S 2Se 2O 
E) H2O 2Se 2S 
A) H2S 2O 2Se 
B) H2O 2S 2Se 
C) H2Se 2O 2S 
D) H2S 2Se 2O 
E) H2O 2Se 2S

Question 10

A solution containing NH3(aq)and NH4Cl(aq)has a pH of 9.5.What is the [NH3]/[NH4+] ratio in this solution? (For ammonia, Kb = 1.8 * 10-5.)

Accepted Answer

The answer of A solution containing NH3(aq)and NH4Cl(aq)has a pH...

Question 11

HCN is classified as a weak acid in water. What does this classification mean?

Accepted Answer

A relatively small f

Question 12

Identify the conjugate base of CH3COOH in the reaction CH3COOH + HSO4-   H2SO4 + CH3COO-

Accepted Answer

A) HSO4- 
B) SO42- 
C) CH3COO- 
D) H2SO4 
E) OH- 
A) HSO4- 
B) SO42- 
C) CH3COO- 
D) H2SO4 
E) OH-

Question 13

Calculate the H+ ion concentration in a solution with a pH of 3.85.

Accepted Answer

1.4 * 10<s

Question 14

Acid strength increases in the series: HCN 4-. Which of these species is the strongest base?

Accepted Answer

A) H2SO4 
B) SO42- 
C) F- 
D) CN - 
E) HSO4- 
A) H2SO4 
B) SO42- 
C) F- 
D) CN - 
E) HSO4-

Question 15

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

Accepted Answer

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

Question 16

If the pH of liquid bleach is 12.0, what is the hydroxide ion concentration in this solution?

Accepted Answer

1 * 10<sup

Question 17

Will a 0.1 M solution of Na2HPO4(aq)be acidic, basic, or neutral?

Accepted Answer

Question 18

Arrange the acids H2Se, H2Te, and H2S in order of increasing acid strength.

Accepted Answer

A) H2S 2Se 2Te 
B) H2S 2Te 2Se 
C) H2Te 2S 2Se 
D) H2Se 2S 2Te 
E) H2Se 2Te 2S 
A) H2S 2Se 2Te 
B) H2S 2Te 2Se 
C) H2Te 2S 2Se 
D) H2Se 2S 2Te 
E) H2Se 2Te 2S

Question 19

Which of these species will act as a Lewis acid?

Accepted Answer

A) NH3 
B) NH4+ 
C) H2O 
D) BF3 
E) F- 
A) NH3 
B) NH4+ 
C) H2O 
D) BF3 
E) F-

Question 20

Hard water deposits (calcium carbonate)have built up around your bathroom sink. Which one of these substances would be most effective in dissolving the deposits?

Accepted Answer

A) ammonia 
B) bleach (sodium hypochlorite) 
C) lye (sodium hydroxide) 
D) vinegar (acetic acid) 
A) ammonia 
B) bleach (sodium hypochlorite) 
C) lye (sodium hydroxide) 
D) vinegar (acetic acid)

Exam 15: Acids and Bases

The pH of a certain solution is 2.0. How many H+(aq)ions are there in 1.0 L of the solution?

In comparing three solutions with pH's of 2.0, 4.8, and 5.2, which is most acidic?

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

Identify the conjugate base of HCO3- in the reaction CO32- + HSO4- HCO3- + SO42-

The pH of coffee is approximately 5.0. How many times greater is the [H3O+] in coffee than in tap water having a pH of 8.0?

Calculate the hydrogen ion concentration in a solution having a pH of 4.60.

If the pH of pure water is 7.0, what is the hydroxide ion concentration in pure water?

The pH of tomato juice is about 4.5. Calculate the concentration of hydrogen ions in this juice.

Which of these lists of molecules is arranged in order of increasing acid strength?

A solution containing NH3(aq)and NH4Cl(aq)has a pH of 9.5.What is the [NH3]/[NH4+] ratio in this solution? (For ammonia, Kb = 1.8 * 10-5.)

HCN is classified as a weak acid in water. What does this classification mean?

Identify the conjugate base of CH3COOH in the reaction CH3COOH + HSO4- H2SO4 + CH3COO-

Calculate the H+ ion concentration in a solution with a pH of 3.85.

Acid strength increases in the series: HCN < HF < HSO4-. Which of these species is the strongest base?

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

If the pH of liquid bleach is 12.0, what is the hydroxide ion concentration in this solution?

Will a 0.1 M solution of Na2HPO4(aq)be acidic, basic, or neutral?

Arrange the acids H2Se, H2Te, and H2S in order of increasing acid strength.

Which of these species will act as a Lewis acid?

Hard water deposits (calcium carbonate)have built up around your bathroom sink. Which one of these substances would be most effective in dissolving the deposits?

Chemistry: The Study of Change

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Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

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Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

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Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

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Filters

The pH of a certain solution is 2.0. How many H⁺(aq)ions are there in 1.0 L of the solution?

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

Identify the conjugate base of HCO₃^- in the reaction CO₃^2- + HSO₄^- HCO₃^- + SO₄^2-

The pH of coffee is approximately 5.0. How many times greater is the [H₃O⁺] in coffee than in tap water having a pH of 8.0?

A solution containing NH₃(aq)and NH₄Cl(aq)has a pH of 9.5.What is the [NH₃]/[NH₄⁺] ratio in this solution? (For ammonia, K_b = 1.8 * 10^-5.)

Identify the conjugate base of CH₃COOH in the reaction CH₃COOH + HSO₄^- H₂SO₄ + CH₃COO^-

Calculate the H⁺ ion concentration in a solution with a pH of 3.85.

Acid strength increases in the series: HCN < HF < HSO₄^-. Which of these species is the strongest base?

Identify the conjugate acid of SO₄^2- in the reaction CO₃^2- + HSO₄^- HCO₃^- + SO₄^2-

Will a 0.1 M solution of Na₂HPO₄(aq)be acidic, basic, or neutral?

Arrange the acids H₂Se, H₂Te, and H₂S in order of increasing acid strength.