Question 1

What is the pH of 6.5 × 10-5 M KOH(aq) at 25°C?

Accepted Answer

A)   -4.19
B)   1.54
C)   4.19
D)   9.81
E)   12.46

Question 2

Which of the following solutions will have a pH of 3.0?

Accepted Answer

A)   1 × 10−3 M CH3CO2H
B)   1 × 10−3 M NH3
C)   1 × 10−3 M NH4+
D)   1 × 10−3 M HI
E)   Answers b and c are correct.

Question 3

If the OH− concentration in a bottle of an ammonia based cleaner is 3.8 × 10−2 M,what is the H+ concentration? (Kw = 1.0 × 10−14)

Accepted Answer

A)   3.8 × 10−16 M
B)   2.6 × 10−13 M
C)   6.8 × 10−2 M
D)   2.6 × 101 M
E)   3.8 × 1012 M

Question 4

What is the conjugate base of water?

Accepted Answer

A)   H+
B)   O2−
C)   OH−
D)   H2O
E)   H3O+

Question 5

The pH of 0.400 M sodium nitrite,NaNO2,is 8.42.What is the Kb for this base?

Accepted Answer

A)   1.7 × 10−11
B)   3.6 × 10−10
C)   3.8 × 10−9
D)   9.5 × 10−9
E)   8.8 × 10−7

Question 6

The conjugate acid of a weak base is

Accepted Answer

A)   amphiprotic.
B)   a weak base.
C)   a weak acid.
D)   a strong acid.
E)   a strong base.

Question 7

Which of the following solutions will have a pH of 11.0?

Accepted Answer

A)   1 × 1011 M Sr(OH) 2
B)   1 × 10−11 M NH3
C)   1 × 10−11 M HCl
D)   1 × 10−3 M NH4+
E)   1 × 10−3 M NaOH

Question 8

The anions derived from strong acids are

Accepted Answer

A)   spectator ions.
B)   strong bases.
C)   amphiprotic.
D)   weak acids.
E)   weak bases.

Question 9

Ammonia is a weak base (Kb = 1.8 × 10−5) .What is the pH of 1.2 M ammonia?

Accepted Answer

A)   2.33
B)   4.74
C)   9.26
D)   10.14
E)   11.67

Question 10

All of the following species are amphiprotic EXCEPT

Accepted Answer

A)   H2O.
B)   HSO4−.
C)   HPO42−.
D)   SO42−.
E)   H2PO4−.

Question 11

Lactic acid,HC3H5O3,is found in sour milk.What is the pH of 0.30 M lactic acid? (Ka = 1.4 × 10−4)

Accepted Answer

A)   0.52
B)   1.07
C)   2.19
D)   4.00
E)   5.12

Question 12

A salt solution can be acidic,basic,or neutral.When dissolved in water,which of the following salts will make the solution acidic: NaCl,Al2(SO4) 3,NaNO3,Na2CO3,KF,and NH4Br?

Accepted Answer

A)   Al2(SO4) 3 and NH4Br
B)   Al2(SO4) 3,Na2CO3 and NH4Br
C)   Al2(SO4) 3 and NaNO3
D)   NaCl,NaNO3 and NH4Br
E)   Na2CO3,KF,and NH4Br

Question 13

What is the conjugate acid of ammonia?

Accepted Answer

A)   H+
B)   H−
C)   NH4+
D)   NH3
E)   NH2−

Question 14

A salt solution can be acidic,basic,or neutral.When dissolved in water,which of the following salts will not affect the pH: KCl,FeCl3,NaNO3,CaCO3,LiF,and NH4Br?

Accepted Answer

A)   KCl and FeCl3
B)   KCl,FeCl3 and NaNO3
C)   CaCO3 and LiF
D)   KCl and NaNO3
E)   CaCO3,LiF,and NH4Br

Question 15

Determine the equilibrium constant for the reaction HF(aq) + NH3(aq)   ? F?(aq) + NH4+(aq) 
Given the equilibrium constants for the following reactions.
 HF(aq) +H2O(l) ⇌F−(aq) +H3O−(aq) Ka=6.9×10−4NH3(aq) +H2O(l) ⇌NH4+(aq) +OH−(aq) Kb=1.8×10−52H2O⇌OH−(aq) +H3O+(aq) KW=1.0×10−14\begin{array}{ll}\mathrm{HF}(a q) +\mathrm{H}_{2} \mathrm{O}(l)  ightleftharpoons \mathrm{F}-(a q) +\mathrm{H}_{3} \mathrm{O}^{-}(a q)  & K_{\mathrm{a}}=6.9 	imes 10^{-4} \\mathrm{NH}_{3}(a q) +\mathrm{H}_{2} \mathrm{O}(l)  ightleftharpoons \mathrm{NH}_{4}^{+}(a q) +\mathrm{OH}-(a q)  & K_{\mathrm{b}}=1.8 	imes 10^{-5} \2 \mathrm{H}_{2} \mathrm{O} ightleftharpoons \mathrm{OH}-(a q) +\mathrm{H}_{3} \mathrm{O}^{+}(a q)  & K_{\mathrm{W}}=1.0 	imes 10^{-14}\end{array}HF(aq) +H2​O(l) ⇌F−(aq) +H3​O−(aq) NH3​(aq) +H2​O(l) ⇌NH4+​(aq) +OH−(aq) 2H2​O⇌OH−(aq) +H3​O+(aq) ​Ka​=6.9×10−4Kb​=1.8×10−5KW​=1.0×10−14​

Accepted Answer

A)   1.2 × 10?8
B)   1.2 × 106
C)   8.1 × 107
D)   1.0 × 1014
E)   3.8 × 1015

Question 16

The pH of aqueous 0.50 M hypobromous acid,HBrO,is 4.45.What is the Ka of this acid?

Accepted Answer

A)   2.5 × 10-9
B)   5.0 × 10-9
C)   3.4 × 10-7
D)   3.5 × 10-5
E)   7.1 × 10-5

Question 17

Which of the following chemical equations corresponds to Ka3 for phosphoric acid,H3PO4?

Accepted Answer

A)   H3PO4(aq) + H2O(l)   ? H2PO4?(aq) + H3O+(aq) 
B)   H2PO4?(aq) + H2O(l)   ? HPO42?(aq) + H3O+(aq) 
C)   HPO42?(aq) + H2O(l)   ? PO43?(aq) + H3O+(aq) 
D)   H3PO4(aq) + 2H2O(l)   ? HPO42?(aq) + 2H3O+(aq) 
E)   H2PO4?(aq) + 2H2O(l)   ? PO43?(aq) + H3O+(aq)

Question 18

What is the conjugate base of [Fe(H2O) 6]3+(aq) ?

Accepted Answer

A)   H3O+
B)   [Fe(H2O) 6]2+
C)   [Fe(H2O) 5H3O]4+
D)   [Fe(H2O) 5OH]2+
E)   [Fe(H2O) 5]3+

Question 19

A species that can either accept or donate a proton is called

Accepted Answer

A)   a Brønsted-Lowry compound.
B)   a Lewis base.
C)   an Arrhenius acid.
D)   amphiprotic.
E)   a conjugate pair.

Question 20

The pH of a human blood sample is 7.30.What is concentration of OH− in blood?

Accepted Answer

A)   5.01 × 10−8 M
B)   2.0 × 10−7 M
C)   7.3 × 10−7 M
D)   5.01 × 10−5 M
E)   2.0 × 107 M

Exam 13: Acids and Bases

The anions derived from strong acids are

Correct Answer
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The pH of 0.400 M sodium nitrite,NaNO₂,is 8.42.What is the K_b for this base?

Correct Answer
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Which of the following chemical equations corresponds to K_a3 for phosphoric acid,H₃PO₄?

Correct Answer
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What is the conjugate acid of ammonia?

Correct Answer
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The pH of a human blood sample is 7.30.What is concentration of OH− in blood?

Correct Answer
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A species that can either accept or donate a proton is called

Correct Answer
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A salt solution can be acidic,basic,or neutral.When dissolved in water,which of the following salts will make the solution acidic: NaCl,Al₂(SO₄) ₃,NaNO₃,Na₂CO₃,KF,and NH₄Br?

Correct Answer
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Lactic acid,HC₃H₅O₃,is found in sour milk.What is the pH of 0.30 M lactic acid? (K_a = 1.4 × 10−⁴)

Correct Answer
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If the OH− concentration in a bottle of an ammonia based cleaner is 3.8 × 10−² M,what is the H⁺ concentration? (K_w = 1.0 × 10−¹⁴)

Correct Answer
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The pH of aqueous 0.50 M hypobromous acid,HBrO,is 4.45.What is the K_a of this acid?

Correct Answer
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Correct Answer
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Which of the following solutions will have a pH of 11.0?

Correct Answer
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All of the following species are amphiprotic EXCEPT

Correct Answer
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The conjugate acid of a weak base is

Correct Answer
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Ammonia is a weak base (K_b = 1.8 × 10−⁵) .What is the pH of 1.2 M ammonia?

Correct Answer
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What is the conjugate base of water?

Correct Answer
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What is the pH of 6.5 × 10^-5 M KOH(aq) at 25°C?

Correct Answer
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Which of the following solutions will have a pH of 3.0?

Correct Answer
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A salt solution can be acidic,basic,or neutral.When dissolved in water,which of the following salts will not affect the pH: KCl,FeCl₃,NaNO₃,CaCO₃,LiF,and NH₄Br?

Correct Answer
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What is the conjugate base of [Fe(H₂O) ₆]³⁺(aq) ?

Correct Answer
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Exam 13: Acids and Bases

The anions derived from strong acids are

Correct AnswerverifiedShow Answer

The pH of 0.400 M sodium nitrite,NaNO2,is 8.42.What is the Kb for this base?

Correct AnswerverifiedShow Answer

Which of the following chemical equations corresponds to Ka3 for phosphoric acid,H3PO4?

Correct AnswerverifiedShow Answer

What is the conjugate acid of ammonia?

Correct AnswerverifiedShow Answer

The pH of a human blood sample is 7.30.What is concentration of OH− in blood?

Correct AnswerverifiedShow Answer

A species that can either accept or donate a proton is called

Correct AnswerverifiedShow Answer

A salt solution can be acidic,basic,or neutral.When dissolved in water,which of the following salts will make the solution acidic: NaCl,Al2(SO4) 3,NaNO3,Na2CO3,KF,and NH4Br?

Correct AnswerverifiedShow Answer

Lactic acid,HC3H5O3,is found in sour milk.What is the pH of 0.30 M lactic acid? (Ka = 1.4 × 10−4)

Correct AnswerverifiedShow Answer

If the OH− concentration in a bottle of an ammonia based cleaner is 3.8 × 10−2 M,what is the H+ concentration? (Kw = 1.0 × 10−14)

Correct AnswerverifiedShow Answer

The pH of aqueous 0.50 M hypobromous acid,HBrO,is 4.45.What is the Ka of this acid?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following solutions will have a pH of 11.0?

Correct AnswerverifiedShow Answer

All of the following species are amphiprotic EXCEPT

Correct AnswerverifiedShow Answer

The conjugate acid of a weak base is

Correct AnswerverifiedShow Answer

Ammonia is a weak base (Kb = 1.8 × 10−5) .What is the pH of 1.2 M ammonia?

Correct AnswerverifiedShow Answer

What is the conjugate base of water?

Correct AnswerverifiedShow Answer

What is the pH of 6.5 × 10-5 M KOH(aq) at 25°C?

Correct AnswerverifiedShow Answer

Which of the following solutions will have a pH of 3.0?

Correct AnswerverifiedShow Answer

A salt solution can be acidic,basic,or neutral.When dissolved in water,which of the following salts will not affect the pH: KCl,FeCl3,NaNO3,CaCO3,LiF,and NH4Br?

Correct AnswerverifiedShow Answer

What is the conjugate base of [Fe(H2O) 6]3+(aq) ?

Correct AnswerverifiedShow Answer

Correct Answer
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The pH of 0.400 M sodium nitrite,NaNO₂,is 8.42.What is the K_b for this base?

Correct Answer
verified

Which of the following chemical equations corresponds to K_a3 for phosphoric acid,H₃PO₄?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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A salt solution can be acidic,basic,or neutral.When dissolved in water,which of the following salts will make the solution acidic: NaCl,Al₂(SO₄) ₃,NaNO₃,Na₂CO₃,KF,and NH₄Br?

Correct Answer
verified

Lactic acid,HC₃H₅O₃,is found in sour milk.What is the pH of 0.30 M lactic acid? (K_a = 1.4 × 10−⁴)

Correct Answer
verified

If the OH− concentration in a bottle of an ammonia based cleaner is 3.8 × 10−² M,what is the H⁺ concentration? (K_w = 1.0 × 10−¹⁴)

Correct Answer
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The pH of aqueous 0.50 M hypobromous acid,HBrO,is 4.45.What is the K_a of this acid?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Ammonia is a weak base (K_b = 1.8 × 10−⁵) .What is the pH of 1.2 M ammonia?

Correct Answer
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Correct Answer
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What is the pH of 6.5 × 10^-5 M KOH(aq) at 25°C?

Correct Answer
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Correct Answer
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A salt solution can be acidic,basic,or neutral.When dissolved in water,which of the following salts will not affect the pH: KCl,FeCl₃,NaNO₃,CaCO₃,LiF,and NH₄Br?

Correct Answer
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What is the conjugate base of [Fe(H₂O) ₆]³⁺(aq) ?

Correct Answer
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