Question 1

Below is a representation of an aqueous solution of a weak acid HA at equilibrium.(Each circle represents 1.0 ×10-3 mol of atoms,and the volume of the box is 1.0 L.Solvent water molecules are not shown for clarity.)  -3 mol of atoms,and the volume of the box is 1.0 L.Solvent water molecules are not shown for clarity.)    What is the pH of the solution? A) 2.4 B) 3.0 C) 2.1 D) 11.0 E) 11.6" class="answers-bank-image d-inline" rel="preload" > What is the pH of the solution?

Accepted Answer

A)  2.4
B)  3.0
C)  2.1
D)  11.0
E)  11.6 B

Question 2

A 1.25 M solution of the weak acid HA is 9.2% dissociated.What is the pH of the solution?

Accepted Answer

A)  0.64
B)  0.94
C)  1.13
D)  2.16
E)  (-0.097)

Question 3

For H3PO4,Ka1 = 7.3 × 10-3,Ka2 = 6.2 × 10-6,and Ka3 = 4.8 × 10-13.A 0.10 M aqueous solution of NaH2PO4 therefore would be _____.

Accepted Answer

A)  neutral
B)  weakly basic
C)  weakly acidic
D)  strongly acidic
E)  strongly basic

Question 4

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)  NaCN

Question 5

What is the pH of a 0.0100 M sodium benzoate solution? Kb (C7H5O2-) = 1.5 × 10-10

Accepted Answer

A)  0.38
B)  12.00
C)  10.91
D)  8.09
E)  13.62

Question 6

The most acidic oxides are formed from elements found in the _________________ region of the periodic table.

Accepted Answer

A)  upper right
B)  upper left
C)  center
D)  lower right
E)  lower left

Question 7

The pH of a Ba(OH) 2 solution is 10.00.What is the H+ ion concentration of this solution?

Accepted Answer

A)  4.0 × 10-11 M
B)  1.6 × 10-10 M
C)  1.3 × 10-5 M
D)  1.0 × 10-10 M
E)  10.00 M

Question 8

What is the value of the equilibrium constant for the autoionization of water at 25°C?

Accepted Answer

A)  1.0 × 10-7
B)  1.0 × 10-14
C)  1.0 × 1014
D)  1.0 × 107
E)  14 B

Question 9

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-

Question 10

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.

Question 11

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 base

Question 12

What is the [H3O+] for a solution at 25°C that has pOH = 5.640?

Accepted Answer

A)  2.34 × 10-4 M
B)  2.29 × 10-6 M
C)  4.37 × 10-9 M
D)  4.27 × 10-11 M
E)  8.360 M

Question 13

After a substance acting as a strong acid reacts,what remains of the acid?

Accepted Answer

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

Question 14

Which is the strongest acid?

Accepted Answer

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

Question 15

NH3 is a typical Lewis base.

Accepted Answer

A) True 
 B)False

Question 16

List the components in an oxoacid.

Accepted Answer

hydrogen,o...

Question 17

What is the conjugate base of water?

Accepted Answer

A)  H3O+
B)  OH-
C)  H3O
D)  OH
E)  H2O2

Question 18

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

Accepted Answer

A)  HCO3-
B)  HSO4-
C)  OH-
D)  H3O+
E)  SO42-

Question 19

What is the pH of a 0.056 M HNO3 solution?

Accepted Answer

A)  0.056
B)  1.25
C)  12.75
D)  2.88
E)  11.11

Question 20

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 × 10-18

Exam 16: Acids and Bases

Below is a representation of an aqueous solution of a weak acid HA at equilibrium.(Each circle represents 1.0 ×10^-3 mol of atoms,and the volume of the box is 1.0 L.Solvent water molecules are not shown for clarity.) What is the pH of the solution?

Correct Answer
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B

A 1.25 M solution of the weak acid HA is 9.2% dissociated.What is the pH of the solution?

Correct Answer
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For H₃PO₄,K_a₁ = 7.3 × 10^-³,K_a₂ = 6.2 × 10^-⁶,and Ka₃ = 4.8 × 10^-¹³.A 0.10 M aqueous solution of NaH₂PO₄ therefore would be _____.

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

Correct Answer
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What is the pH of a 0.0100 M sodium benzoate solution? K_b (C₇H₅O₂^-) = 1.5 × 10^-¹⁰

Correct Answer
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The most acidic oxides are formed from elements found in the _________________ region of the periodic table.

Correct Answer
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The pH of a Ba(OH) ₂ solution is 10.00.What is the H⁺ ion concentration of this solution?

Correct Answer
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What is the value of the equilibrium constant for the autoionization of water at 25°C?

Correct Answer
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B

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

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

Correct Answer
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What is the [H₃O⁺] for a solution at 25°C that has pOH = 5.640?

Correct Answer
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After a substance acting as a strong acid reacts,what remains of the acid?

Correct Answer
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Which is the strongest acid?

Correct Answer
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A

NH₃ is a typical Lewis base.

Correct Answer
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List the components in an oxoacid.

Correct Answer
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hydrogen,o...
View Answer

What is the conjugate base of water?

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

Correct Answer
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What is the pH of a 0.056 M HNO₃ solution?

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

Correct Answer
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Exam 16: Acids and Bases

Below is a representation of an aqueous solution of a weak acid HA at equilibrium.(Each circle represents 1.0 ×10-3 mol of atoms,and the volume of the box is 1.0 L.Solvent water molecules are not shown for clarity.) What is the pH of the solution?

Correct AnswerverifiedB

A 1.25 M solution of the weak acid HA is 9.2% dissociated.What is the pH of the solution?

Correct AnswerverifiedShow Answer

For H3PO4,Ka1 = 7.3 × 10-3,Ka2 = 6.2 × 10-6,and Ka3 = 4.8 × 10-13.A 0.10 M aqueous solution of NaH2PO4 therefore would be _____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the pH of a 0.0100 M sodium benzoate solution? Kb (C7H5O2-) = 1.5 × 10-10

Correct AnswerverifiedShow Answer

The most acidic oxides are formed from elements found in the _________________ region of the periodic table.

Correct AnswerverifiedShow Answer

The pH of a Ba(OH) 2 solution is 10.00.What is the H+ ion concentration of this solution?

Correct AnswerverifiedShow Answer

What is the value of the equilibrium constant for the autoionization of water at 25°C?

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the [H3O+] for a solution at 25°C that has pOH = 5.640?

Correct AnswerverifiedShow Answer

After a substance acting as a strong acid reacts,what remains of the acid?

Correct AnswerverifiedShow Answer

Which is the strongest acid?

Correct AnswerverifiedA

NH3 is a typical Lewis base.

Correct AnswerverifiedShow Answer

List the components in an oxoacid.

Correct Answerverifiedhydrogen,o...View AnswerShow Answer

What is the conjugate base of water?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the pH of a 0.056 M HNO3 solution?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Below is a representation of an aqueous solution of a weak acid HA at equilibrium.(Each circle represents 1.0 ×10^-3 mol of atoms,and the volume of the box is 1.0 L.Solvent water molecules are not shown for clarity.) What is the pH of the solution?

Correct Answer
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B

Correct Answer
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For H₃PO₄,K_a₁ = 7.3 × 10^-³,K_a₂ = 6.2 × 10^-⁶,and Ka₃ = 4.8 × 10^-¹³.A 0.10 M aqueous solution of NaH₂PO₄ therefore would be _____.

Correct Answer
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Correct Answer
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What is the pH of a 0.0100 M sodium benzoate solution? K_b (C₇H₅O₂^-) = 1.5 × 10^-¹⁰

Correct Answer
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Correct Answer
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The pH of a Ba(OH) ₂ solution is 10.00.What is the H⁺ ion concentration of this solution?

Correct Answer
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Correct Answer
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B

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

Correct Answer
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Correct Answer
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Correct Answer
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What is the [H₃O⁺] for a solution at 25°C that has pOH = 5.640?

Correct Answer
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Correct Answer
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Correct Answer
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A

NH₃ is a typical Lewis base.

Correct Answer
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Correct Answer
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hydrogen,o...
View Answer

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

Correct Answer
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What is the pH of a 0.056 M HNO₃ solution?

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

Correct Answer
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