Question 1

Which of the following acids will have the strongest conjugate base?

Accepted Answer

A)  HCl 
B)  HClO4 
C)  H2SO4 
D)  HCN 
E)  KF 
A)  HCl 
B)  HClO4 
C)  H2SO4 
D)  HCN 
E)  KF

Question 2

Identify the products that are in equilibrium with NH3 and H2O.

Accepted Answer

A)  NH2- and H3O+ 
B)  NH3, H+, and -OH 
C)  NH3 and H2O 
D)  NH4+ and -OH 
E)  NH2-, H+, and H2O 
A)  NH2- and H3O+ 
B)  NH3, H+, and -OH 
C)  NH3 and H2O 
D)  NH4+ and -OH 
E)  NH2-, H+, and H2O

Question 3

What is the pH of a 0.020 M HClO4 solution?

Accepted Answer

A)  0.020 
B)  0.040 
C)  1.70 
D)  12.30 
A)  0.020 
B)  0.040 
C)  1.70 
D)  12.30

Question 4

Calculate the pH for an aqueous hydrobromic acid solution that contains 4.15 × 10-3 M hydronium ion.

Accepted Answer

A)  2.41 × 10-12 M 
B)  4.15 × 10-3 M 
C)  2.38 
D)  11.62 
E)  12.50 
A)  2.41 × 10-12 M 
B)  4.15 × 10-3 M 
C)  2.38 
D)  11.62 
E)  12.50

Question 5

Determine the pH of a 0.227 M C5H5N solution at 25°C.The Kb of C5H5N is 1.7 × 10-9.

Accepted Answer

A)  4.59 
B)  9.41 
C)  4.71 
D)  10.14 
E)  9.29 
A)  4.59 
B)  9.41 
C)  4.71 
D)  10.14 
E)  9.29

Question 6

Describe the relationship between molecular structure and acid strength.

Accepted Answer

1)The stronger the bond between a hydrog

Question 7

A 7.0 × 10-3 M aqueous solution of   at 25.0°C has a pH of ________.

Accepted Answer

A)  12.15 
B)  1.85 
C)  1.4 × 10-2 
D)  7.1 × 10-13 
E)  11.85 
A)  12.15 
B)  1.85 
C)  1.4 × 10-2 
D)  7.1 × 10-13 
E)  11.85

Question 8

Determine the pOH of a 0.188 M NH3 solution at 25°C.The Kb of NH3 is 1.76 × 10-5.

Accepted Answer

A)  5.480 
B)  2.740 
C)  8.520 
D)  11.260 
E)  12.656 
A)  5.480 
B)  2.740 
C)  8.520 
D)  11.260 
E)  12.656

Question 9

Calculate the pOH of a nitrous acid solution that contains 3.9 × 10-8 M H3O⁺ at 25°C.

Accepted Answer

A)  8.41 
B)  7.41 
C)  6.59 
D)  5.59 
E)  0.59 
A)  8.41 
B)  7.41 
C)  6.59 
D)  5.59 
E)  0.59

Question 10

Place the following in order of increasing acid strength. HBrO2 HBrO3 HBrO HBrO4

Accepted Answer

A)  HBrO2 4 3 
B)  HBrO 2 3 4 
C)  HBrO2 3 4 4 2 3 4 3 2 
A)  HBrO2 4 3 
B)  HBrO 2 3 4 
C)  HBrO2 3 4 4 2 3 4 3 2

Question 11

Identify the food that does NOT irritate the wall of the stomach.

Accepted Answer

A)  orange juice 
B)  plum 
C)  egg white 
D)  lemon 
E)  wine 
A)  orange juice 
B)  plum 
C)  egg white 
D)  lemon 
E)  wine

Question 12

Calculate the pH of a solution that contains 7.8 × 10-6 M OH⁻ at 25°C.

Accepted Answer

A)  1.28 
B)  5.11 
C)  12.72 
D)  8.89 
E)  9.64 
A)  1.28 
B)  5.11 
C)  12.72 
D)  8.89 
E)  9.64

Question 13

Calculate the hydroxide ion concentration in an aqueous solution with a pH of 9.85 at 25°C.

Accepted Answer

A)  7.1 × 10-5 M 
B)  4.2 × 10-10 M 
C)  8.7 × 10-10 M 
D)  6.5 × 10-5 M 
E)  1.4 × 10-10 M 
A)  7.1 × 10-5 M 
B)  4.2 × 10-10 M 
C)  8.7 × 10-10 M 
D)  6.5 × 10-5 M 
E)  1.4 × 10-10 M

Question 14

Determine the ammonia concentration of an aqueous solution that has a pH of 11.00.The equation for the dissociation of NH3 (Kb = 1.8 × 10-5)is NH3(aq)+ H2O(l)⇌ NH4+(aq)+ OH-(aq)

Accepted Answer

A)  3.0 M 
B)  0.056 M 
C)  1.8 × 10-2 M 
D)  1.0 × 10-3 M 
A)  3.0 M 
B)  0.056 M 
C)  1.8 × 10-2 M 
D)  1.0 × 10-3 M

Question 15

Calculate the pH of a 0.60 M H2SO3,solution that has the stepwise dissociation constants Ka1 = 1.5 × 10-2 and Ka2 = 6.3 × 10-8.

Accepted Answer

A)  1.02 
B)  1.06 
C)  1.82 
D)  2.04 
A)  1.02 
B)  1.06 
C)  1.82 
D)  2.04

Question 16

Determine the pOH of a 0.741 M LiOH solution at 25°C.

Accepted Answer

A)  0.130 
B)  13.87 
C)  0.741 
D)  13.26 
E)  1.48 
A)  0.130 
B)  13.87 
C)  0.741 
D)  13.26 
E)  1.48

Question 17

Calculate the pH of a 0.080 M carbonic acid solution,H2CO3(aq), that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

Accepted Answer

A)  1.10 
B)  3.73 
C)  6.37 
D)  10.25 
A)  1.10 
B)  3.73 
C)  6.37 
D)  10.25

Question 18

Determine the Kb for CN⁻ at 25°C.The Ka for HCN is 4.9 × 10-10.

Accepted Answer

A)  4.9 × 10-14 
B)  2.3 × 10-9 
C)  1.4 × 10-5 
D)  2.0 × 10-5 
E)  3.7 × 10-7 
A)  4.9 × 10-14 
B)  2.3 × 10-9 
C)  1.4 × 10-5 
D)  2.0 × 10-5 
E)  3.7 × 10-7

Question 19

A Lewis base

Accepted Answer

A)  donates an electron pair. 
B)  is a H+ donor. 
C)  is a H+ acceptor. 
D)  produces OH- in aqueous solutions. 
E)  produces H+ in aqueous solutions. 
A)  donates an electron pair. 
B)  is a H+ donor. 
C)  is a H+ acceptor. 
D)  produces OH- in aqueous solutions. 
E)  produces H+ in aqueous solutions.

Question 20

Describe a molecule that can be a Lewis acid.

Accepted Answer

A molecule with an i

Exam 16: Acids and Bases

Which of the following acids will have the strongest conjugate base?

Identify the products that are in equilibrium with NH3 and H2O.

What is the pH of a 0.020 M HClO4 solution?

Calculate the pH for an aqueous hydrobromic acid solution that contains 4.15 × 10-3 M hydronium ion.

Determine the pH of a 0.227 M C5H5N solution at 25°C.The Kb of C5H5N is 1.7 × 10-9.

Describe the relationship between molecular structure and acid strength.

A 7.0 × 10-3 M aqueous solution of at 25.0°C has a pH of ________.

Determine the pOH of a 0.188 M NH3 solution at 25°C.The Kb of NH3 is 1.76 × 10-5.

Calculate the pOH of a nitrous acid solution that contains 3.9 × 10-8 M H3O⁺ at 25°C.

Place the following in order of increasing acid strength. HBrO2 HBrO3 HBrO HBrO4

Identify the food that does NOT irritate the wall of the stomach.

Calculate the pH of a solution that contains 7.8 × 10-6 M OH⁻ at 25°C.

Calculate the hydroxide ion concentration in an aqueous solution with a pH of 9.85 at 25°C.

Determine the ammonia concentration of an aqueous solution that has a pH of 11.00.The equation for the dissociation of NH3 (Kb = 1.8 × 10-5)is NH3(aq)+ H2O(l)⇌ NH4+(aq)+ OH-(aq)

Calculate the pH of a 0.60 M H2SO3,solution that has the stepwise dissociation constants Ka1 = 1.5 × 10-2 and Ka2 = 6.3 × 10-8.

Determine the pOH of a 0.741 M LiOH solution at 25°C.

Calculate the pH of a 0.080 M carbonic acid solution,H2CO3(aq), that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

Determine the Kb for CN⁻ at 25°C.The Ka for HCN is 4.9 × 10-10.

A Lewis base

Describe a molecule that can be a Lewis acid.

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Identify the products that are in equilibrium with NH₃ and H₂O.

What is the pH of a 0.020 M HClO₄ solution?

Calculate the pH for an aqueous hydrobromic acid solution that contains 4.15 × 10^-3M hydronium ion.

Determine the pH of a 0.227 M C₅H₅N solution at 25°C.The K_b of C₅H₅N is 1.7 × 10^-9.

A 7.0 × 10^-3 M aqueous solution of at 25.0°C has a pH of ________.

Determine the pOH of a 0.188 M NH₃ solution at 25°C.The K_bof NH₃ is 1.76 × 10^-5.

Calculate the pOH of a nitrous acid solution that contains 3.9 × 10^-⁸ M H₃O⁺ at 25°C.

Place the following in order of increasing acid strength. HBrO₂ HBrO₃ HBrO HBrO₄

Calculate the pH of a solution that contains 7.8 × 10^-6 M OH⁻ at 25°C.

Determine the ammonia concentration of an aqueous solution that has a pH of 11.00.The equation for the dissociation of NH₃ (K_b= 1.8 × 10^-5)is NH₃(aq)+ H₂O(l)⇌ NH₄⁺(aq)+ OH^-(aq)

Calculate the pH of a 0.60 M H₂SO₃,solution that has the stepwise dissociation constants K_a1 = 1.5 × 10^-2 and K_a2 = 6.3 × 10^-⁸.

Calculate the pH of a 0.080 M carbonic acid solution,H₂CO₃₍_aq₎,that has the stepwise dissociation constants K_a1 = 4.3 × 10^-7 and K_a2 = 5.6 × 10^-11.

Determine the K_b for CN⁻ at 25°C.The K_a for HCN is 4.9 × 10^-10.