Question 1

What is the pH of a 0.0055 M HA (weak acid)solution that is 8.2% ionized?

Accepted Answer

A) 2.26 
B) 3.35 
C) 4.52 
D) 8.21 
E) 10.65 
A) 2.26 
B) 3.35 
C) 4.52 
D) 8.21 
E) 10.65

Question 2

Which one of the following salts will form an acidic solution on dissolving in water?

Accepted Answer

A) LiBr 
B) NaF 
C) KOH 
D) FeCl3 
E) NaCN 
A) LiBr 
B) NaF 
C) KOH 
D) FeCl3 
E) NaCN

Question 3

Identify the conjugate base of HClO3 in the reaction ClO3- + HSO4- $\rarr$ HClO3 + SO42-

Accepted Answer

A) ClO3- 
B) HSO4- 
C) OH- 
D) H3O+ 
E) SO42- 
A) ClO3- 
B) HSO4- 
C) OH- 
D) H3O+ 
E) SO42-

Question 4

What is the pH of a 0.014 M Ca(OH)2 solution?

Accepted Answer

A) 1.85 
B) 1.55 
C) 12.15 
D) 12.45 
E) 15.85 
A) 1.85 
B) 1.55 
C) 12.15 
D) 12.45 
E) 15.85

Question 5

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

Accepted Answer

Question 6

Calculate the concentration of malonate ion (C3H2O42-)in a 0.200 M solution of malonic acid (C3H4O4). [For malonic acid, Ka1 = 1.4 * 10-3, Ka2 = 2.0 * 10-6.]

Accepted Answer

A) 2.8 * 10-4 M 
B) 0.016 M 
C) 1.8 * 10-4 M 
D) 1.4 * 10-3 M 
E) 2.0 * 10-6 M 
A) 2.8 * 10-4 M 
B) 0.016 M 
C) 1.8 * 10-4 M 
D) 1.4 * 10-3 M 
E) 2.0 * 10-6 M

Question 7

Which is the formula for the hydronium ion?

Accepted Answer

A) OH- 
B) H2O 
C) H3O+ 
D) H3O- 
E) H2O+ 
A) OH- 
B) H2O 
C) H3O+ 
D) H3O- 
E) H2O+

Question 8

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

Accepted Answer

The soluti

Question 9

In the reaction H2CO3 + H2O $\rarr$ HCO3- + H3O+, the Brønsted acids are

Accepted Answer

A) H2CO3 and H2O. 
B) HCO3- and H2CO3. 
C) H2O and H3O+. 
D) H3O+ and H2CO3. 
E) H2O and HCO3-. 
A) H2CO3 and H2O. 
B) HCO3- and H2CO3. 
C) H2O and H3O+. 
D) H3O+ and H2CO3. 
E) H2O and HCO3-.

Question 10

Which one of these equations represents the reaction of a weak acid with a weak base?

Accepted Answer

A) H+(aq)+ OH-(aq)$\rarr$H2O(aq) 
B) H+(aq)+ CH3NH2(aq)$\rarr$CH3NH3+(aq) 
C) OH-(aq)+ HCN(aq)$\rarr$ H2O(aq)+ CN-(aq) 
D) HCN(aq)+ CH3NH2(aq)$\rarr$CH3NH3+(aq)+ CN-(aq) 
A) H+(aq)+ OH-(aq)$\rarr$H2O(aq) 
B) H+(aq)+ CH3NH2(aq)$\rarr$CH3NH3+(aq) 
C) OH-(aq)+ HCN(aq)$\rarr$ H2O(aq)+ CN-(aq) 
D) HCN(aq)+ CH3NH2(aq)$\rarr$CH3NH3+(aq)+ CN-(aq)

Question 11

What is the pH of a solution prepared by mixing 100. mL of 0.0500 M HCl with 300. mL of 0.500 M HF? [Ka(HF)= 7.1 * 10-4]

Accepted Answer

A) 1.47 
B) 1.90 
C) 1.30 
D) 1.63 
E) 2.82 
A) 1.47 
B) 1.90 
C) 1.30 
D) 1.63 
E) 2.82

Question 12

An aqueous solution of KCl would be

Accepted Answer

A) neutral. 
B) basic. 
C) acidic. 
A) neutral. 
B) basic. 
C) acidic.

Question 13

Write the chemical formula for perchloric acid.

Accepted Answer

The answer of Write the chemical formula for perchloric acid....

Question 14

Which response gives the products of hydrolysis of NH4Cl?

Accepted Answer

A) NH4+ + HCl 
B) NH3 + OH- + HCl 
C) NH3 + H+ 
D) NH4OH + HCl 
E) No hydrolysis occurs. 
A) NH4+ + HCl 
B) NH3 + OH- + HCl 
C) NH3 + H+ 
D) NH4OH + HCl 
E) No hydrolysis occurs.

Question 15

What is the H+ ion concentration in a 4.8 * 10-2 M KOH solution?

Accepted Answer

A) 4.8 * 10-2 M 
B) 1.0 * 10-7 M 
C) 4.8 * 10-11 M 
D) 4.8 * 10-12 M 
E) 2.1 * 10-13 M 
A) 4.8 * 10-2 M 
B) 1.0 * 10-7 M 
C) 4.8 * 10-11 M 
D) 4.8 * 10-12 M 
E) 2.1 * 10-13 M

Question 16

A 8.0 M solution of formic acid (HCOOH)is 0.47% ionized. What is the Ka of formic acid?

Accepted Answer

1.77 * 10<

Question 17

Which of the following yields a basic solution when dissolved in water?

Accepted Answer

A) NO2 
B) P4O10 
C) K2O 
D) NaCl 
E) SO2 
A) NO2 
B) P4O10 
C) K2O 
D) NaCl 
E) SO2

Question 18

Will a 0.1 M solution of NaH2PO4(aq)be acidic, basic, or neutral?

Accepted Answer

Question 19

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 20

Arrange the acids HBr, H2Se, and H3As in order of increasing acid strength.

Accepted Answer

A) HBr 2Se 3As 
B) HBr 3As 2Se 
C) H2Se 3As 3As 2Se 3As 2Se 
A) HBr 2Se 3As 
B) HBr 3As 2Se 
C) H2Se 3As 3As 2Se 3As 2Se

Exam 16: Acids and Bases

What is the pH of a 0.0055 M HA (weak acid)solution that is 8.2% ionized?

Which one of the following salts will form an acidic solution on dissolving in water?

Identify the conjugate base of HClO3 in the reaction ClO3- + HSO4- →\rarr→ HClO3 + SO42-

What is the pH of a 0.014 M Ca(OH)2 solution?

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

Calculate the concentration of malonate ion (C3H2O42-)in a 0.200 M solution of malonic acid (C3H4O4). [For malonic acid, Ka1 = 1.4 * 10-3, Ka2 = 2.0 * 10-6.]

Which is the formula for the hydronium ion?

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

In the reaction H2CO3 + H2O →\rarr→ HCO3- + H3O+, the Brønsted acids are

Which one of these equations represents the reaction of a weak acid with a weak base?

What is the pH of a solution prepared by mixing 100. mL of 0.0500 M HCl with 300. mL of 0.500 M HF? [Ka(HF)= 7.1 * 10-4]

An aqueous solution of KCl would be

Write the chemical formula for perchloric acid.

Which response gives the products of hydrolysis of NH4Cl?

What is the H+ ion concentration in a 4.8 * 10-2 M KOH solution?

A 8.0 M solution of formic acid (HCOOH)is 0.47% ionized. What is the Ka of formic acid?

Which of the following yields a basic solution when dissolved in water?

Will a 0.1 M solution of NaH2PO4(aq)be acidic, basic, or neutral?

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

Arrange the acids HBr, H2Se, and H3As in order of increasing acid strength.

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

Identify the conjugate base of HClO₃ in the reaction ClO₃^- + HSO₄^- $\rarr$ HClO₃ + SO₄^2-

What is the pH of a 0.014 M Ca(OH)₂ solution?

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

Calculate the concentration of malonate ion (C₃H₂O₄^2-)in a 0.200 M solution of malonic acid (C₃H₄O₄). [For malonic acid, K_a1 = 1.4 * 10^-3, K_a2 = 2.0 * 10^-6.]

In the reaction H₂CO₃ + H₂O $\rarr$ HCO₃^- + H₃O⁺, the Brønsted acids are

What is the pH of a solution prepared by mixing 100. mL of 0.0500 M HCl with 300. mL of 0.500 M HF? [K_a(HF)= 7.1 * 10^-4]

Which response gives the products of hydrolysis of NH₄Cl?

What is the H⁺ ion concentration in a 4.8 * 10^-2 M KOH solution?

A 8.0 M solution of formic acid (HCOOH)is 0.47% ionized. What is the K_a of formic acid?

Will a 0.1 M solution of NaH₂PO₄(aq)be acidic, basic, or neutral?

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

Arrange the acids HBr, H₂Se, and H₃As in order of increasing acid strength.