Question 1

Which one of these salts will form an acidic solution upon dissolving in water?

Accepted Answer

A)   LiBr
B)   NaF
C)   NH4Br
D)   KOH
E)   NaCNF) B) and E)
G) All of the above

Question 2

Which is a Lewis acid?

Accepted Answer

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

Question 3

Which statement is true regarding the reversible reaction below? H2CO3+ F- 
  2CO3+ F-      HCO3+ HF. Ka1(H2CO3)  = 4.2 × 10-7; Ka(HF)  = 7.1 × 10-4 A)  At equilibrium, [HF] > [H2CO3] because HF is a stronger acid than H2CO3. B)  At equilibrium, [HF] > [H2CO3] because H2CO3 is a stronger acid than HF. C)  At equilibrium, [HF] = [H2CO3]. D)  At equilibrium, [H2CO3] > [HF] because HF is a stronger acid than H2CO3. E)  At equilibrium, [H2CO3] > [HF] because H2CO3 is a stronger acid than HF." class="answers-bank-image d-inline" rel="preload" > HCO3+ HF.
Ka1(H2CO3)  = 4.2 × 10-7; Ka(HF)  = 7.1 × 10-4

Accepted Answer

A)   At equilibrium, [HF] > [H2CO3] because HF is a stronger acid than H2CO3.
B)   At equilibrium, [HF] > [H2CO3] because H2CO3 is a stronger acid than HF.
C)   At equilibrium, [HF] = [H2CO3].
D)   At equilibrium, [H2CO3] > [HF] because HF is a stronger acid than H2CO3.
E)   At equilibrium, [H2CO3] > [HF] because H2CO3 is a stronger acid than HF.F) C) and D)
G) A) and D)

Question 4

A student adds 0.1 mol of oxalic acid and 0.1 mol of sodium dihydrogen phosphate to enough water to make 1.0 L of solution. The following equilibrium is established with the concentrations of the products greater than the concentrations of the reactants. Which of the statements about the equilibrium system is correct? H2C2O4(aq)  + H2PO4-(aq)  2C2O4(aq)  + H2PO4-(aq)    HC2O4-(aq)  + H3PO4(aq)  A)  Oxalic acid is a weaker acid than phosphoric acid. B)  The hydrogen oxalate anion, HC2O4-, is a stronger base than the dihydrogen phosphate anion, H2PO4-. C)  Phosphoric acid is a weaker acid than oxalic acid. D)  The dihydrogen phosphate anion, H2PO4-, is a stronger acid than oxalic acid. E)  Water is a stronger acid than either oxalic or phosphoric acids." class="answers-bank-image d-inline" rel="preload" > HC2O4-(aq)  + H3PO4(aq)

Accepted Answer

A)   Oxalic acid is a weaker acid than phosphoric acid.
B)   The hydrogen oxalate anion, HC2O4-, is a stronger base than the dihydrogen phosphate anion, H2PO4-.
C)   Phosphoric acid is a weaker acid than oxalic acid.
D)   The dihydrogen phosphate anion, H2PO4-, is a stronger acid than oxalic acid.
E)   Water is a stronger acid than either oxalic or phosphoric acids.F) B) and E)
G) A) and D)

Question 5

What is [OH-] for a solution at 25°C that has [H3O+] = 8.23 × 10-2 M?

Accepted Answer

A)   8.23 × 10-2 M
B)   1.22 × 10-6 M
C)   8.23 × 10-12 M
D)   1.22 × 10-13 M
E)   8.23 × 10-16 MF) A) and B)
G) A) and E)

Question 6

When the cation of a salt is the conjugate acid of a weak base then a solution of this salt will be ________.

Accepted Answer

The answer of When the cation of a salt is...

Question 7

What is the name of a proton acceptor in an acid-base reaction?

Accepted Answer

A)   Arrhenius acid
B)   Arrhenius base
C)   Brønsted acid
D)   Brønsted base
E)   Lewis baseF) A) and C)
G) B) and D)

Question 8

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 MF) A) and C)
G) A) and B)

Question 9

Since arsenic is a nonmetal, As2O3 is expected to be a/an ________ oxide.

Accepted Answer

A)   acidic
B)   ionic
C)   amphoteric
D)   neutral
E)   basicF) None of the above
G) D) and E)

Question 10

The substance NH3 is considered to be

Accepted Answer

A)   a weak acid.
B)   a weak base.
C)   a strong acid.
D)   a strong base.
E)   a neutral compound.F) B) and D)
G) C) and D)

Question 11

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-F) None of the above
G) A) and B)

Question 12

Picric acid has been used in the leather industry and in etching copper. However, its laboratory use has been restricted because it dehydrates on standing and can become shock sensitive. It has an acid dissociation constant of 0.42. What is the [H3O+] for a 0.20 M solution of picric acid?

Accepted Answer

A)   0.022 M
B)   0.052 M
C)   0.15 M
D)   0.20 M
E)   0.29 MF) All of the above
G) A) and C)

Question 13

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

Accepted Answer

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

Question 14

NH3 is a typical Lewis base.

Accepted Answer

A) True 
 B)False

Question 15

What is the conjugate acid of HS-?

Accepted Answer

A)   HS2
B)   S2-
C)   HS
D)   H2S
E)   SOHF) A) and E)
G) B) and D)

Question 16

Which is the weakest acid?

Accepted Answer

A)   SO42-
B)   H2SO3
C)   H2SO4
D)   HSO4-
E)   HSO3-F) B) and E)
G) B) and C)

Question 17

What is the value of Kb for the formate anion, HCOO- ? Ka (HCOOH)  = 2.1 × 10-4

Accepted Answer

A)   -2.1 × 10-4
B)   2.1 × 10-4
C)   6.9 × 10-6
D)   4.8 × 10-11
E)   2.1 × 10-18F) A) and B)
G) C) and D)

Question 18

What is the conjugate base of HSO4- in the reaction below? CO32- + HSO4- 4- in the reaction below? CO32- + HSO4-   HCO3- + SO42- A)  HSO4- B)  CO32- C)  OH- D)  H3O+ E)  SO42-" class="answers-bank-image d-inline" rel="preload" > HCO3- + SO42-

Accepted Answer

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

Question 19

In aqueous solutions at 25°C, the sum of the hydroxide ion and hydronium ion concentrations ([H3O+] + [OH -]) equals 1 × 10-14.

Accepted Answer

A) True 
 B)False

Question 20

A solution of sodium acetate (CH3COONa) in water is weakly basic.

Accepted Answer

A) True 
 B)False

Exam 16: Acids and Bases

Picric acid has been used in the leather industry and in etching copper. However, its laboratory use has been restricted because it dehydrates on standing and can become shock sensitive. It has an acid dissociation constant of 0.42. What is the [H₃O⁺] for a 0.20 M solution of picric acid?

Correct Answer
verified

What is the name of a proton acceptor in an acid-base reaction?

Correct Answer
verified

In aqueous solutions at 25°C, the sum of the hydroxide ion and hydronium ion concentrations ([H₃O⁺] + [OH^-]) equals 1 × 10^-14.

Correct Answer
verified

Which statement is true regarding the reversible reaction below? H₂CO₃+ F^- HCO₃+ HF. K_a1(H₂CO₃) = 4.2 × 10^-7; K_a(HF) = 7.1 × 10^-4

Correct Answer
verified

Which one of these salts will form an acidic solution upon dissolving in water?

Correct Answer
verified

What is the conjugate base of HSO₄^- in the reaction below? CO₃^2- + HSO₄^- HCO₃^- + SO₄^2-

Correct Answer
verified

What is the value of K_b for the formate anion, HCOO^- ? K_a (HCOOH) = 2.1 × 10^-4

Correct Answer
verified

The substance NH₃ is considered to be

Correct Answer
verified

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

Correct Answer
verified

Which is the weakest acid?

Correct Answer
verified

Correct Answer
verified

A solution of sodium acetate (CH₃COONa) in water is weakly basic.

Correct Answer
verified

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

Correct Answer
verified

What is the conjugate acid of HS-?

Correct Answer
verified

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

Correct Answer
verified

Which is a Lewis acid?

Correct Answer
verified

NH₃ is a typical Lewis base.

Correct Answer
verified

What is [OH^-] for a solution at 25°C that has [H₃O⁺] = 8.23 × 10^-2^M?

Correct Answer
verified

When the cation of a salt is the conjugate acid of a weak base then a solution of this salt will be ________.

Correct Answer
verified

Since arsenic is a nonmetal, As₂O₃ is expected to be a/an ________ oxide.

Correct Answer
verified

Exam 16: Acids and Bases

Picric acid has been used in the leather industry and in etching copper. However, its laboratory use has been restricted because it dehydrates on standing and can become shock sensitive. It has an acid dissociation constant of 0.42. What is the [H3O+] for a 0.20 M solution of picric acid?

Correct AnswerverifiedShow Answer

What is the name of a proton acceptor in an acid-base reaction?

Correct AnswerverifiedShow Answer

In aqueous solutions at 25°C, the sum of the hydroxide ion and hydronium ion concentrations ([H3O+] + [OH -]) equals 1 × 10-14.

Correct AnswerverifiedShow Answer

Which statement is true regarding the reversible reaction below? H2CO3+ F- HCO3+ HF. Ka1(H2CO3) = 4.2 × 10-7; Ka(HF) = 7.1 × 10-4

Correct AnswerverifiedShow Answer

Which one of these salts will form an acidic solution upon dissolving in water?

Correct AnswerverifiedShow Answer

What is the conjugate base of HSO4- in the reaction below? CO32- + HSO4- HCO3- + SO42-

Correct AnswerverifiedShow Answer

What is the value of Kb for the formate anion, HCOO- ? Ka (HCOOH) = 2.1 × 10-4

Correct AnswerverifiedShow Answer

The substance NH3 is considered to be

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which is the weakest acid?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A solution of sodium acetate (CH3COONa) in water is weakly basic.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the conjugate acid of HS-?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which is a Lewis acid?

Correct AnswerverifiedShow Answer

NH3 is a typical Lewis base.

Correct AnswerverifiedShow Answer

What is [OH-] for a solution at 25°C that has [H3O+] = 8.23 × 10-2 M?

Correct AnswerverifiedShow Answer

When the cation of a salt is the conjugate acid of a weak base then a solution of this salt will be ________.

Correct AnswerverifiedShow Answer

Since arsenic is a nonmetal, As2O3 is expected to be a/an ________ oxide.

Correct AnswerverifiedShow Answer

Picric acid has been used in the leather industry and in etching copper. However, its laboratory use has been restricted because it dehydrates on standing and can become shock sensitive. It has an acid dissociation constant of 0.42. What is the [H₃O⁺] for a 0.20 M solution of picric acid?

Correct Answer
verified

Correct Answer
verified

In aqueous solutions at 25°C, the sum of the hydroxide ion and hydronium ion concentrations ([H₃O⁺] + [OH^-]) equals 1 × 10^-14.

Correct Answer
verified

Which statement is true regarding the reversible reaction below? H₂CO₃+ F^- HCO₃+ HF. K_a1(H₂CO₃) = 4.2 × 10^-7; K_a(HF) = 7.1 × 10^-4

Correct Answer
verified

Correct Answer
verified

What is the conjugate base of HSO₄^- in the reaction below? CO₃^2- + HSO₄^- HCO₃^- + SO₄^2-

Correct Answer
verified

What is the value of K_b for the formate anion, HCOO^- ? K_a (HCOOH) = 2.1 × 10^-4

Correct Answer
verified

The substance NH₃ is considered to be

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A solution of sodium acetate (CH₃COONa) in water is weakly basic.

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

NH₃ is a typical Lewis base.

Correct Answer
verified

What is [OH^-] for a solution at 25°C that has [H₃O⁺] = 8.23 × 10^-2^M?

Correct Answer
verified

Correct Answer
verified

Since arsenic is a nonmetal, As₂O₃ is expected to be a/an ________ oxide.

Correct Answer
verified