Question 1

What is the conjugate base of sulfuric acid?

Accepted Answer

A) HSO4- 
B) H3O+ 
C) OH- 
D) SO42- 
E) H3SO4+ 
A) HSO4- 
B) H3O+ 
C) OH- 
D) SO42- 
E) H3SO4+

Question 2

What is the concentration of H+ in a 0.025 M HCl solution?

Accepted Answer

A) 0 
B) 0.013 M 
C) 0.025 M 
D) 0.050 M 
E) 0.010 M 
A) 0 
B) 0.013 M 
C) 0.025 M 
D) 0.050 M 
E) 0.010 M

Question 3

Below is a representation of an aqueous solution of a weak acid HA at equilibrium.(Each circle represents 1.0 mmol of atoms,and the volume of the box is 1.0 L.Solvent water molecules are not shown for clarity.)   What is the percent ionization of HA?

Accepted Answer

A) 100% 
B) 50% 
C) 25% 
D) 12.5% 
E) Cannot be calculated without knowledge of Ka 
A) 100% 
B) 50% 
C) 25% 
D) 12.5% 
E) Cannot be calculated without knowledge of Ka

Question 4

RCOOH is an organic compound which is in the ______________ family.

Accepted Answer

The answer of RCOOH is an organic compound which is...

Question 5

If a strong acid such as HCl is diluted sufficiently with water,the pH will be higher than 7.

Accepted Answer

A) True 
 B)False

Question 6

Which one of these salts will form a basic solution upon dissolving in water?

Accepted Answer

A) NaCl 
B) NaNO2 
C) NH4NO3 
D) KBr 
E) AlCl3 
A) NaCl 
B) NaNO2 
C) NH4NO3 
D) KBr 
E) AlCl3

Question 7

Which is the weakest acid?

Accepted Answer

A) HBrO4 
B) HBr 
C) HBrO2 
D) HBrO 
E) HBrO3 
A) HBrO4 
B) HBr 
C) HBrO2 
D) HBrO 
E) HBrO3

Question 8

Ammonium chloride is used as an electrolyte in dry cells.Which statement about a 0.10 M solution of NH4Cl is correct?

Accepted Answer

A) The solution is weakly basic. 
B) The solution is strongly basic. 
C) The solution is neutral. 
D) The solution is acidic. 
E) The values for Ka and Kb for the species in solution must be known before a prediction can be made. 
A) The solution is weakly basic. 
B) The solution is strongly basic. 
C) The solution is neutral. 
D) The solution is acidic. 
E) The values for Ka and Kb for the species in solution must be known before a prediction can be made.

Question 9

What is the conjugate acid of the hydroxide ion?

Accepted Answer

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

Question 10

Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr),for which Ka = 2.06 ×10-9.

Accepted Answer

A) 4.712 
B) 8.686 
C) 0.738 
D) 4.576 
E) 9.288 
A) 4.712 
B) 8.686 
C) 0.738 
D) 4.576 
E) 9.288

Question 11

Butyric acid is responsible for the odor in rancid butter.A solution of 0.25 M butyric acid has a pH of 2.71.What is the Ka for the acid?

Accepted Answer

A) 0.36 
B) 2.4 × 10-2 
C) 7.8 × 10-3 
D) 1.5 × 10-5 
E) 1.9 × 10-3 
A) 0.36 
B) 2.4 × 10-2 
C) 7.8 × 10-3 
D) 1.5 × 10-5 
E) 1.9 × 10-3

Question 12

The reaction of a strong acid with water results in

Accepted Answer

A) a weak conjugate acid. 
B) a strong conjugate base. 
C) a weak conjugate base. 
D) a strong base. 
E) pure water. 
A) a weak conjugate acid. 
B) a strong conjugate base. 
C) a weak conjugate base. 
D) a strong base. 
E) pure water.

Question 13

What is the concentration of OH- in a 0.083 M NaOH solution?

Accepted Answer

A) 0.083 M 
B) 1.21 × 10-13 M 
C) 8.30 × 10-16 M 
D) 7 M 
E) 8.30 × 1012 M 
A) 0.083 M 
B) 1.21 × 10-13 M 
C) 8.30 × 10-16 M 
D) 7 M 
E) 8.30 × 1012 M

Question 14

Which is the correct statement?

Accepted Answer

A) A polyprotic acid has more than two ionizable protons. 
B) H2O is a diprotic acid. 
C) All protons are lost from a polyprotic acid at the same time. 
D) NH3 is a diprotic acid. 
E) NH3 is a polyprotic acid. 
A) A polyprotic acid has more than two ionizable protons. 
B) H2O is a diprotic acid. 
C) All protons are lost from a polyprotic acid at the same time. 
D) NH3 is a diprotic acid. 
E) NH3 is a polyprotic acid.

Question 15

A solution is prepared by adding 0.10 mol of potassium chloride,KCl,to 1.00 L of water.Which statement about the solution is correct?

Accepted Answer

A) The solution is basic. 
B) The solution is neutral. 
C) The solution is acidic. 
D) The solution is a strong oxidant. 
E) The values for Ka and Kb for the species in solution must be known before a prediction can be made. 
A) The solution is basic. 
B) The solution is neutral. 
C) The solution is acidic. 
D) The solution is a strong oxidant. 
E) The values for Ka and Kb for the species in solution must be known before a prediction can be made.

Question 16

What is the pH of a 0.050 M triethylamine,(C2H5)3N,solution? Kb for triethylamine is 5.3 × 10-4.

Accepted Answer

A) 11.69 
B) 8.68 
C) 5.32 
D) 2.31 
E) 1.30 
A) 11.69 
B) 8.68 
C) 5.32 
D) 2.31 
E) 1.30

Question 17

Which is the strongest base?

Accepted Answer

A) CH3NH2,Kb = 4.4 × 10-4 
B) C5H5N,Kb = 1.7 × 10-9 
C) H2NCONH2,Kb = 1.5 × 10-14 
D) NH3,Kb = 1.8 × 10-5 
E) C2H5NH2,Kb = 5.6 × 10-4 
A) CH3NH2,Kb = 4.4 × 10-4 
B) C5H5N,Kb = 1.7 × 10-9 
C) H2NCONH2,Kb = 1.5 × 10-14 
D) NH3,Kb = 1.8 × 10-5 
E) C2H5NH2,Kb = 5.6 × 10-4

Question 18

What is the conjugate acid of HS-?

Accepted Answer

A) HS2 
B) S2- 
C) HS 
D) H2S 
E) SOH 
A) HS2 
B) S2- 
C) HS 
D) H2S 
E) SOH

Question 19

A hydrohalic acid is a binary acid containing a halogen.

Accepted Answer

A) True 
 B)False

Question 20

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-

Exam 16: Acids and Bases

What is the conjugate base of sulfuric acid?

What is the concentration of H+ in a 0.025 M HCl solution?

Below is a representation of an aqueous solution of a weak acid HA at equilibrium.(Each circle represents 1.0 mmol of atoms,and the volume of the box is 1.0 L.Solvent water molecules are not shown for clarity.) What is the percent ionization of HA?

RCOOH is an organic compound which is in the ______________ family.

If a strong acid such as HCl is diluted sufficiently with water,the pH will be higher than 7.

Which one of these salts will form a basic solution upon dissolving in water?

Which is the weakest acid?

Ammonium chloride is used as an electrolyte in dry cells.Which statement about a 0.10 M solution of NH4Cl is correct?

What is the conjugate acid of the hydroxide ion?

Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr),for which Ka = 2.06 ×10-9.

Butyric acid is responsible for the odor in rancid butter.A solution of 0.25 M butyric acid has a pH of 2.71.What is the Ka for the acid?

The reaction of a strong acid with water results in

What is the concentration of OH- in a 0.083 M NaOH solution?

Which is the correct statement?

A solution is prepared by adding 0.10 mol of potassium chloride,KCl,to 1.00 L of water.Which statement about the solution is correct?

What is the pH of a 0.050 M triethylamine,(C2H5)3N,solution? Kb for triethylamine is 5.3 × 10-4.

Which is the strongest base?

What is the conjugate acid of HS-?

A hydrohalic acid is a binary acid containing a halogen.

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

Chemistry: the Central Science

Atoms Molecules and Ions

Stoichiometry Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I Basic Concepts

Chemical Bonding Ii Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

What is the concentration of H⁺ in a 0.025 M HCl solution?

Ammonium chloride is used as an electrolyte in dry cells.Which statement about a 0.10 M solution of NH₄Cl is correct?

Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr),for which K_a = 2.06 ×10^-⁹.

Butyric acid is responsible for the odor in rancid butter.A solution of 0.25 M butyric acid has a pH of 2.71.What is the K_a for the acid?

What is the concentration of OH^- in a 0.083 M NaOH solution?

What is the pH of a 0.050 M triethylamine,(C₂H₅)₃N,solution? Kb for triethylamine is 5.3 × 10^-⁴.

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