Question 1

An aqueous solution at 25.0°C contains [   ] = 0.085 M.What is the pH of the solution?

Accepted Answer

A) 1.07 
B) -1.07 
C) 13.0 
D) 0.0850 
E) 1.20 ×   
A) 1.07 
B) -1.07 
C) 13.0 
D) 0.0850 
E) 1.20 ×

Question 2

What is the pH of an aqueous solution at 25.0 °C in which   ] is 0.0015 M?

Accepted Answer

A) 6.50 
B) 2.82 
C) -2.82 
D) -6.50 
E) none of the above 
A) 6.50 
B) 2.82 
C) -2.82 
D) -6.50 
E) none of the above

Question 3

Of the following acids,________ is a strong acid.

Accepted Answer

A) HNO2 
B) H2CO3 
C) HNO3 
D) HClO 
E) HF 
A) HNO2 
B) H2CO3 
C) HNO3 
D) HClO 
E) HF

Question 4

Ka for HF is 7.0 × 10-4.Kb for the fluoride ion is ________.

Accepted Answer

A) 2.0 × 10-8 
B) 1.4 × 10-11 
C) 7.0 × 10-18 
D) 7.0 × 10-4 
E) 1.4 × 103 
A) 2.0 × 10-8 
B) 1.4 × 10-11 
C) 7.0 × 10-18 
D) 7.0 × 10-4 
E) 1.4 × 103

Question 5

Classify the following compounds as weak acids (W)or strong acids (S): nitric acid perchloric acid chloric acid

Accepted Answer

A) W W W 
B) W S S 
C) S S S 
D) S W W 
E) W S W 
A) W W W 
B) W S S 
C) S S S 
D) S W W 
E) W S W

Question 6

A 1.0 × 10-2 M aqueous solution of   at 25.0 °C has a pH of ________.

Accepted Answer

A) 12.30 
B) 1.70 
C) 2.0 × 10-2 
D) 5.0 × 10-13 
E) 12.00 
A) 12.30 
B) 1.70 
C) 2.0 × 10-2 
D) 5.0 × 10-13 
E) 12.00

Question 7

Classify the following compounds as weak acids (W)or strong acids (S): benzoic acid nitric acid acetic acid

Accepted Answer

A) W W W 
B) S S S 
C) S W W 
D) W S S 
E) W S W 
A) W W W 
B) S S S 
C) S W W 
D) W S S 
E) W S W

Question 8

The conjugate acid of SO42- is ________.

Accepted Answer

A) OH- 
B) H2SO4 
C) HSO4- 
D) HSO42- 
E) H3SO4+ 
A) OH- 
B) H2SO4 
C) HSO4- 
D) HSO42- 
E) H3SO4+

Question 9

Using the data in the table,which of the conjugate acids below is the weakest acid?

Accepted Answer

A) NH4+ 
B) C5H5NH+ 
C) H3NOH+ 
D) NH3CH3+ 
E) NH4+ and NH3CH3+ 
A) NH4+ 
B) C5H5NH+ 
C) H3NOH+ 
D) NH3CH3+ 
E) NH4+ and NH3CH3+

Question 10

Determine the pH of a 0.35 M aqueous solution of CH3NH2 (methylamine).The Kb of methylamine is   .

Accepted Answer

A) 10.00 
B) 3.86 
C) 12.09 
D) 1.96 
E) 13.24 
A) 10.00 
B) 3.86 
C) 12.09 
D) 1.96 
E) 13.24

Question 11

What is the pH of an aqueous solution at 25.0 °C that contains 2.50 × 10-4 M hydronium ion?

Accepted Answer

A) 10.4 
B) 4.00 
C) 2.50 
D) 3.60 
E) 7.00 
A) 10.4 
B) 4.00 
C) 2.50 
D) 3.60 
E) 7.00

Question 12

Using the data in the table,which of the conjugate acids below is the strongest acid?

Accepted Answer

A) HClO 
B) HCO3- 
C) H2S 
D) NH3CH3+ 
E) H2S and HClO 
A) HClO 
B) HCO3- 
C) H2S 
D) NH3CH3+ 
E) H2S and HClO

Question 13

Which of the following salts will produce a neutral solution?

Accepted Answer

A) NaBr 
B) LiNO2 
C) LiF 
D) Na2CO3 
E) NH4Cl 
A) NaBr 
B) LiNO2 
C) LiF 
D) Na2CO3 
E) NH4Cl

Question 14

Of the following substances,an aqueous solution of ________ will form basic solutions. NaHS Cu(NO3)2 KHCO3 NaF

Accepted Answer

A) NaHS, Cu(NO3)2 
B) KHCO3, NaHS 
C) NaF only 
D) NaF, KHCO3 
E) NaHS, KHCO3 and NaF 
A) NaHS, Cu(NO3)2 
B) KHCO3, NaHS 
C) NaF only 
D) NaF, KHCO3 
E) NaHS, KHCO3 and NaF

Question 15

A 0.22 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 4.15.The value of Ka for HA is ________.

Accepted Answer

A) 7.1 × 10-5 
B) 3.2 × 10-4 
C) 2.2 × 10-1 
D) 2.3 × 10-8 
E) 3.2 × 104 
A) 7.1 × 10-5 
B) 3.2 × 10-4 
C) 2.2 × 10-1 
D) 2.3 × 10-8 
E) 3.2 × 104

Question 16

What is the pOH of a 0.20 M aqueous solution of N   Br at 25.0 °C?   for N   is 1.8 ×   .

Accepted Answer

A) 2.72 
B) 4.98 
C) 11.28 
D) 11.23 
E) 9.02 
A) 2.72 
B) 4.98 
C) 11.28 
D) 11.23 
E) 9.02

Question 17

The Ka of acetic acid (HC2H3O2)is   What is the pH at 25.0 °C of an aqueous solution that is   in

Accepted Answer

A) +2.87 
B) -2.87 
C) -11.13 
D) +11.13 
E) +6.61 
A) +2.87 
B) -2.87 
C) -11.13 
D) +11.13 
E) +6.61

Question 18

The pOH of a 0.25 M aqueous solution of HA at 25.0 °C is 9.52.What is the value of Ka for HA?

Accepted Answer

Question 19

Calculate the molarity of hydroxide ion in an aqueous solution that has a pOH of 3.00.

Accepted Answer

A) 1.0 × 10-3 
B) 11.00 
C) 1.0 × 10-11 
D) 3.0 ×   
E) 1.1 × 10-13 
A) 1.0 × 10-3 
B) 11.00 
C) 1.0 × 10-11 
D) 3.0 ×   
E) 1.1 × 10-13

Question 20

A 0.14 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 3.15.The value of Ka for HA is ________.

Accepted Answer

A) 7.08 × 10-4 
B) 3.58 × 10-6 
C) 5.01 × 10-7 
D) 7.02 × 10-8 
E) none of the above 
A) 7.08 × 10-4 
B) 3.58 × 10-6 
C) 5.01 × 10-7 
D) 7.02 × 10-8 
E) none of the above

Exam 16: Acid-Base Equilibria

An aqueous solution at 25.0°C contains [ ] = 0.085 M.What is the pH of the solution?

What is the pH of an aqueous solution at 25.0 °C in which ] is 0.0015 M?

Of the following acids,________ is a strong acid.

Ka for HF is 7.0 × 10-4.Kb for the fluoride ion is ________.

Classify the following compounds as weak acids (W)or strong acids (S): nitric acid perchloric acid chloric acid

A 1.0 × 10-2 M aqueous solution of at 25.0 °C has a pH of ________.

Classify the following compounds as weak acids (W)or strong acids (S): benzoic acid nitric acid acetic acid

The conjugate acid of SO42- is ________.

Using the data in the table,which of the conjugate acids below is the weakest acid?

Determine the pH of a 0.35 M aqueous solution of CH3NH2 (methylamine).The Kb of methylamine is .

What is the pH of an aqueous solution at 25.0 °C that contains 2.50 × 10-4 M hydronium ion?

Using the data in the table,which of the conjugate acids below is the strongest acid?

Which of the following salts will produce a neutral solution?

Of the following substances,an aqueous solution of ________ will form basic solutions. NaHS Cu(NO3)2 KHCO3 NaF

A 0.22 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 4.15.The value of Ka for HA is ________.

What is the pOH of a 0.20 M aqueous solution of N Br at 25.0 °C? for N is 1.8 × .

The Ka of acetic acid (HC2H3O2)is What is the pH at 25.0 °C of an aqueous solution that is in

The pOH of a 0.25 M aqueous solution of HA at 25.0 °C is 9.52.What is the value of Ka for HA?

Calculate the molarity of hydroxide ion in an aqueous solution that has a pOH of 3.00.

A 0.14 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 3.15.The value of Ka for HA is ________.

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

K_a for HF is 7.0 × 10^-4.K_b for the fluoride ion is ________.

A 1.0 × 10^-2 M aqueous solution of at 25.0 °C has a pH of ________.

The conjugate acid of SO₄^2- is ________.

Determine the pH of a 0.35 M aqueous solution of CH₃NH₂ (methylamine).The K_b of methylamine is .

What is the pH of an aqueous solution at 25.0 °C that contains 2.50 × 10^-4 M hydronium ion?

Of the following substances,an aqueous solution of ________ will form basic solutions. NaHS Cu(NO₃)₂ KHCO₃ NaF

A 0.22 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 4.15.The value of K_a for HA is ________.

The K_a of acetic acid (HC₂H₃O₂)is What is the pH at 25.0 °C of an aqueous solution that is in

The pOH of a 0.25 M aqueous solution of HA at 25.0 °C is 9.52.What is the value of K_a for HA?

A 0.14 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 3.15.The value of K_a for HA is ________.