Question 1

Which of the following pairs has the stronger acid listed first?

Accepted Answer

A)   HBr, HI
B)   HClO2, HClO3
C)   H2SeO4, H2SeO3
D)   HNO2, HNO3
E)   HF, HClF) A) and E)
G) D) and E)

Question 2

All weak acids have strong conjugate bases.

Accepted Answer

A) True 
 B)False

Question 3

The English are fond of soggy French fries ("chips") wrapped in old newspaper and generously drenched in vinegar, which is a 0.83 M solution of acetic acid. If the acetic acid in vinegar is 0.47% dissociated, calculate Ka for this acid.

Accepted Answer

Question 4

If the compound HX is a strong acid (where H is the acidic proton in this acid), then the ion X- is a weak base.

Accepted Answer

A) True 
 B)False

Question 5

The hydrated Al3+ ion, Al(H2O) 63+, is a weak acid in water. What are the products of its reaction with H2O? Al(H2O) 63+(aq)  + H2O(l)   ?

Accepted Answer

A)   Al(H2O) 5OH2+(aq)  + H3O+(aq) 
B)   Al(H2O) 6H4+(aq)  + OH-( aq) 
C)   Al(H2O) 53+(aq)  + 2H2O(l) 
D)   Al(H2O) 6OH2+(aq)  + H3O+( aq) 
E)   Al(H2O) 62+(aq)  + H3O+( aq) F) A) and B)
G) All of the above

Question 6

Kw = 1.0 × 10-14, regardless of temperature.

Accepted Answer

A) True 
 B)False

Question 7

All Brønsted-Lowry bases have at least one lone pair of electrons.

Accepted Answer

A) True 
 B)False

Question 8

All Brønsted-Lowry bases contain the hydroxide ion, OH-.

Accepted Answer

A) True 
 B)False

Question 9

Define an acid according to the Arrhenius theory, and write a balanced equation to support this definition.

Accepted Answer

An acid is a substance which c...

Question 10

Which of the following aqueous liquids is the most acidic?

Accepted Answer

A)   0.1 M Al(NO3) 3, Ka = 1 × 10-5
B)   0.1 M Be(NO3) 2, Ka = 4 × 10-6
C)   0.1 M Pb(NO3) 2, Ka = 3 × 10-8
D)   0.1 M Ni(NO3) 2, Ka = 1 × 10-10
E)   pure waterF) C) and D)
G) A) and D)

Question 11

Ammonium chloride is used as an electrolyte in dry cells. Which of the following statements 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.F) C) and D)
G) A) and C)

Question 12

The substance HCl is considered

Accepted Answer

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

Question 13

Which of the following acids has the lowest pH? 0.1 M HBO, pKa = 2.43
0) 1 M HA, pKa = 4.55
0) 1 M HMO, pKa = 8.23
0) 1 M HST, pKa = 11.89
Pure water

Accepted Answer

A)   HA
B)   HST
C)   HMO
D)   HBO
E)   pure waterF) A) and B)
G) C) and D)

Question 14

An aqueous solution is prepared by dissolving the salt formed by the neutralization of a weak acid by a weak base. Which statement about the solution is correct?

Accepted Answer

A)   The solution is strongly basic.
B)   The solution is weakly 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.F) C) and D)
G) B) and E)

Question 15

Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. H3PO4(aq)  + NO2-(aq)  3PO4(aq)  + NO2-(aq)    H2PO4-(aq)  + HNO2(aq)  The equilibrium constant Kc for this reaction is greater than one. Based on this information, which of the following statements is correct? A)  Phosphoric acid is a weaker acid than nitrous acid. B)  Nitrous acid is a weaker acid than water. C)  The nitrite anion is a weaker base than the dihydrogen phosphate anion. D)  The dihydrogen phosphate anion is a stronger acid than nitrous acid. E)  Phosphoric acid is a stronger acid than nitrous acid." class="answers-bank-image d-inline" rel="preload" > H2PO4-(aq)  + HNO2(aq) 
The equilibrium constant Kc for this reaction is greater than one. Based on this information, which of the following statements is correct?

Accepted Answer

A)   Phosphoric acid is a weaker acid than nitrous acid.
B)   Nitrous acid is a weaker acid than water.
C)   The nitrite anion is a weaker base than the dihydrogen phosphate anion.
D)   The dihydrogen phosphate anion is a stronger acid than nitrous acid.
E)   Phosphoric acid is a stronger acid than nitrous acid.F) All of the above
G) A) and E)

Question 16

Which of the following is considered a Lewis acid?

Accepted Answer

A)   CH3NH2
B)   BCl3
C)   F-
D)   BF4-
E)   CH4F) None of the above
G) A) and B)

Question 17

What is the pH of a 0.0125 M NaOH solution?

Accepted Answer

A)   0.972
B)   1.903
C)   12.097
D)   13.028
E)   none of the aboveF) B) and C)
G) A) and E)

Question 18

Which one of the following substances will give an aqueous solution of pH < 7?

Accepted Answer

A)   KI
B)   NH4Br
C)   Na2CO3
D)   CH3COONa
E)   CH3OHF) A) and E)
G) A) and D)

Question 19

Which one of the following is a strong acid?

Accepted Answer

A)   H2CO3
B)   H2SO3
C)   H2SO4
D)   H3PO4
E)   CH3COOHF) None of the above
G) A) and D)

Question 20

The ammonium ion, NH4+, is a weak acid.

Accepted Answer

A) True 
 B)False

Exam 18: Acid-Base Equilibria

Define an acid according to the Arrhenius theory, and write a balanced equation to support this definition.

Correct Answer
verified
An acid is a substance which c...
View Answer

Which one of the following is a strong acid?

Correct Answer
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Which of the following aqueous liquids is the most acidic?

Correct Answer
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The hydrated Al³⁺ ion, Al(H₂O) ₆³⁺, is a weak acid in water. What are the products of its reaction with H₂O? Al(H₂O) ₆³⁺(aq) + H₂O(l)  ?

Correct Answer
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Which of the following pairs has the stronger acid listed first?

Correct Answer
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The English are fond of soggy French fries ("chips") wrapped in old newspaper and generously drenched in vinegar, which is a 0.83 M solution of acetic acid. If the acetic acid in vinegar is 0.47% dissociated, calculate K_a for this acid.

Correct Answer
verified

K_w = 1.0 × 10^-14, regardless of temperature.

Correct Answer
verified

All Brønsted-Lowry bases contain the hydroxide ion, OH^-.

Correct Answer
verified

What is the pH of a 0.0125 M NaOH solution?

Correct Answer
verified

The substance HClis considered

Correct Answer
verified

If the compound HX is a strong acid (where H is the acidic proton in this acid), then the ion X^- is a weak base.

Correct Answer
verified

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

Correct Answer
verified

An aqueous solution is prepared by dissolving the salt formed by the neutralization of a weak acid by a weak base. Which statement about the solution is correct?

Correct Answer
verified

All weak acids have strong conjugate bases.

Correct Answer
verified

Which of the following is considered a Lewis acid?

Correct Answer
verified

The ammonium ion, NH₄⁺, is a weak acid.

Correct Answer
verified

All Brønsted-Lowry bases have at least one lone pair of electrons.

Correct Answer
verified

Which one of the following substances will give an aqueous solution of pH < 7?

Correct Answer
verified

Correct Answer
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Which of the following acids has the lowest pH? 0.1 M HBO, pK_a = 2.43 0) 1 M HA, pK_a = 4.55 0) 1 M HMO, pK_a = 8.23 0) 1 M HST, pK_a = 11.89 Pure water

Correct Answer
verified

Exam 18: Acid-Base Equilibria

Define an acid according to the Arrhenius theory, and write a balanced equation to support this definition.

Correct AnswerverifiedAn acid is a substance which c...View AnswerShow Answer

Which one of the following is a strong acid?

Correct AnswerverifiedShow Answer

Which of the following aqueous liquids is the most acidic?

Correct AnswerverifiedShow Answer

The hydrated Al3+ ion, Al(H2O) 63+, is a weak acid in water. What are the products of its reaction with H2O? Al(H2O) 63+(aq) + H2O(l)  ?

Correct AnswerverifiedShow Answer

Which of the following pairs has the stronger acid listed first?

Correct AnswerverifiedShow Answer

The English are fond of soggy French fries ("chips") wrapped in old newspaper and generously drenched in vinegar, which is a 0.83 M solution of acetic acid. If the acetic acid in vinegar is 0.47% dissociated, calculate Ka for this acid.

Correct AnswerverifiedShow Answer

Kw = 1.0 × 10-14, regardless of temperature.

Correct AnswerverifiedShow Answer

All Brønsted-Lowry bases contain the hydroxide ion, OH-.

Correct AnswerverifiedShow Answer

What is the pH of a 0.0125 M NaOH solution?

Correct AnswerverifiedShow Answer

The substance HCl is considered

Correct AnswerverifiedShow Answer

If the compound HX is a strong acid (where H is the acidic proton in this acid), then the ion X- is a weak base.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An aqueous solution is prepared by dissolving the salt formed by the neutralization of a weak acid by a weak base. Which statement about the solution is correct?

Correct AnswerverifiedShow Answer

All weak acids have strong conjugate bases.

Correct AnswerverifiedShow Answer

Which of the following is considered a Lewis acid?

Correct AnswerverifiedShow Answer

The ammonium ion, NH4+, is a weak acid.

Correct AnswerverifiedShow Answer

All Brønsted-Lowry bases have at least one lone pair of electrons.

Correct AnswerverifiedShow Answer

Which one of the following substances will give an aqueous solution of pH < 7?

Correct AnswerverifiedShow Answer

Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. H3PO4(aq) + NO2-(aq) H2PO4-(aq) + HNO2(aq) The equilibrium constant Kc for this reaction is greater than one. Based on this information, which of the following statements is correct?

Correct AnswerverifiedShow Answer

Which of the following acids has the lowest pH? 0.1 M HBO, pKa = 2.43 0) 1 M HA, pKa = 4.55 0) 1 M HMO, pKa = 8.23 0) 1 M HST, pKa = 11.89 Pure water

Correct AnswerverifiedShow Answer

Correct Answer
verified
An acid is a substance which c...
View Answer

Correct Answer
verified

Correct Answer
verified

The hydrated Al³⁺ ion, Al(H₂O) ₆³⁺, is a weak acid in water. What are the products of its reaction with H₂O? Al(H₂O) ₆³⁺(aq) + H₂O(l)  ?

Correct Answer
verified

Correct Answer
verified

The English are fond of soggy French fries ("chips") wrapped in old newspaper and generously drenched in vinegar, which is a 0.83 M solution of acetic acid. If the acetic acid in vinegar is 0.47% dissociated, calculate K_a for this acid.

Correct Answer
verified

K_w = 1.0 × 10^-14, regardless of temperature.

Correct Answer
verified

All Brønsted-Lowry bases contain the hydroxide ion, OH^-.

Correct Answer
verified

Correct Answer
verified

The substance HClis considered

Correct Answer
verified

If the compound HX is a strong acid (where H is the acidic proton in this acid), then the ion X^- is a weak base.

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The ammonium ion, NH₄⁺, is a weak acid.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which of the following acids has the lowest pH? 0.1 M HBO, pK_a = 2.43 0) 1 M HA, pK_a = 4.55 0) 1 M HMO, pK_a = 8.23 0) 1 M HST, pK_a = 11.89 Pure water

Correct Answer
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