Question 1

Strong acids are leveled in water to the strength of the acid H3O+.

Accepted Answer

A) True 
 B)False

Question 2

What is the conjugate base of H2PO4- ?

Accepted Answer

A)  HPO42-
B)  OH-
C)  H3PO4
D)  H2PO4-
E)  PO43-

Question 3

Which of the following is the strongest base?

Accepted Answer

A)  methylamine (pKb = 3.44) 
B)  morphine (pKb = 5.79) 
C)  urea (pKb = 13.90) 
D)  ammonia (pKb = 4.75) 
E)  pyridine (pKb = 8.75)  A

Question 4

The Ka of phenol is 1.3 * 10-10.For a solution labeled "1.0 * 10-3 M aqueous phenol,"

Accepted Answer

A)  [H3O+] = [H3O+]2/[phenol]initial.
B)  [H3O+] initial.
C)  [H3O+] > 10-6.
D)  pH ~ 4.
E)  Kw/[H3O+] >> [phenol]initial.

Question 5

Write the autoprotolysis reaction for liquid ammonia.

Accepted Answer

2NH₃(l)↔ ...

Question 6

All of the following acids have the same strength in water except

Accepted Answer

A)  HNO3
B)  HClO3
C)  HBr
D)  HF

Question 7

For a solution labeled "0.10 M H3PO4(aq) ,"

Accepted Answer

A)  [H2PO4-] is greater than 0.10 M.
B)  [H+] = 0.30 M.
C)  [PO43-] = 0.10 M.
D)  [H+] = 0.10 M.
E)  [H+] is less than 0.10 M.

Question 8

The amino acid alanine,HOOC-CH(CH3) NH3+,has Ka1 = 4.5 * 10-3 and Ka2 = 1.4 * 10-10.Calculate  α\alphaα (-OOC-CH(CH3) NH3+) at pH 3.

Accepted Answer

A)  0
B)  0.82
C)  0.18
D)  0.29
E)  0.58

Question 9

The conjugate base of ammonia is

Accepted Answer

A)  NH2OH.
B)  NH2-.
C)  NH4+.
D)  NH3.
E)  OH-.

Question 10

The pH of 0.010 M aniline(aq) is 8.32.What is the percentage aniline protonated?

Accepted Answer

A)  2.1%
B)  0.69%
C)  0.021%
D)  0.12%
E)  0.21%

Question 11

The pH of 0.010 M H3PO4(aq) is 2.24; estimate the concentration of PO43- in the solution.For H3PO4,the values of Ka1,Ka2,and Ka3 are 7.6 *10-3,6.2 * 10-8,and 2.1 * 10-13,respectively.

Accepted Answer

A)  5.8 * 10-3 M
B)  2.1 * 10-13 M
C)  7.6 * 10-3 M
D)  6.2 * 10-8 M
E)  2.3 * 10-18 M

Question 12

In a solution labeled "0.0018 M barium hydroxide" what is the molarity of OH-?

Accepted Answer

A)  0.0018 M
B)  0.00090 M
C)  0.0036 M
D)  0.0072 M
E)  None of the above.

Question 13

The fractional composition diagram for the amino acid alanine is given below.  Write the structure of the dominant species at pH 1,6,and 12,respectively.

Accepted Answer

HOOC-CH(CH₃)NH₃⁺,^-OOC-CH(CH₃)NH₃⁺ and ^-OOC-CH(CH₃)NH₂.

Question 14

The following 0.1 M aqueous solutions are arranged in order of increasing pH,with the highest pH on the far right. 3COOH C) KNO2  D) NaBr E) NaHSO4 " class="answers-bank-image d-inline" rel="preload" > Which one of the following 0.10 M aqueous solutions should be placed in the empty box?

Accepted Answer

A)  NaCN
B)  CH3COOH
C)  KNO2 
D)  NaBr
E)  NaHSO4

Question 15

When CaO(s) is dissolved in water,which of the following is true?

Accepted Answer

A)  The solution contains O2-(aq) ,OH-(aq) ,and Ca2+(aq) .
B)  The solution contains CaO(aq) .
C)  CaO(s) does not dissolve in water.
D)  The solution contains O2-(aq) and Ca2+(aq) .
E)  The solution contains OH-(aq) and Ca2+(aq) .

Question 16

Of the following,which is the strongest acid?

Accepted Answer

A)  CH3COOH (pKa = 4.75) 
B)  HNO2 (pKa = 3.37) 
C)  HF (pKa = 3.45) 
D)  HCN (pKa = 9.31) 
E)  HIO3 (pKa = 0.77)

Question 17

Which of the following is the weakest acid?

Accepted Answer

A)  HNO3
B)  HClO4
C)  HClO2
D)  HClO

Question 18

Write the charge balance equation for a solution that is 0.0010 M phenol(aq) .Let phenol be represented by HA(aq) .

Accepted Answer

A)  [H3O+] = [OH-]
B)  Kw = [H3O+][OH-]
C)  [H3O+] = [OH-] + [A-]
D)  Ka = Kw/Kb 
E)  0.0010 = [HA] + [A-]

Question 19

Which of the following is the strongest acid?

Accepted Answer

A)  CH3CH2OH
B)  CH3COOH
C)  CHCl2COOH
D)  CH2ClCOOH
E)  CCl3COOH E

Question 20

The amino acid methionine,HOOC-CH(CH2CH2SCH3) NH3+,has pKa1 = 2.2 and pKa2 = 9.1.If this amino acid is represented by H2L+,the major species at pH 6 is

Accepted Answer

A)  HL
B)  H2L+
C)  L-
D)  HL and L-

Exam 12: Acids and Bases

Strong acids are leveled in water to the strength of the acid H₃O⁺.

Correct Answer
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What is the conjugate base of H₂PO₄^- ?

Correct Answer
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Which of the following is the strongest base?

Correct Answer
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A

The K_a of phenol is 1.3 * 10^-10.For a solution labeled "1.0 * 10^-3 M aqueous phenol,"

Correct Answer
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Write the autoprotolysis reaction for liquid ammonia.

Correct Answer
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2NH₃(l)↔ ...
View Answer

All of the following acids have the same strength in water except

Correct Answer
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For a solution labeled "0.10 M H₃PO₄(aq) ,"

Correct Answer
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The amino acid alanine,HOOC-CH(CH₃) NH₃⁺,has K_a1 = 4.5 * 10^-3 and K_a2 = 1.4 * 10^-10.Calculate $\alpha$ (^-OOC-CH(CH₃) NH₃⁺) at pH 3.

Correct Answer
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The conjugate base of ammonia is

Correct Answer
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The pH of 0.010 M aniline(aq) is 8.32.What is the percentage aniline protonated?

Correct Answer
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The pH of 0.010 M H₃PO₄(aq) is 2.24; estimate the concentration of PO₄³^- in the solution.For H₃PO₄,the values of K_a1,K_a2,and K_a3 are 7.6 10^-³,6.2 10^-⁸,and 2.1 * 10^-13,respectively.

Correct Answer
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In a solution labeled "0.0018 M barium hydroxide" what is the molarity of OH^-?

Correct Answer
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Correct Answer
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HOOC-CH(CH₃)NH₃⁺,^-OOC-CH(CH₃)NH₃⁺ and ^-OOC-CH(CH₃)NH₂.

The following 0.1 M aqueous solutions are arranged in order of increasing pH,with the highest pH on the far right. Which one of the following 0.10 M aqueous solutions should be placed in the empty box?

Correct Answer
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When CaO(s) is dissolved in water,which of the following is true?

Correct Answer
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Of the following,which is the strongest acid?

Correct Answer
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Which of the following is the weakest acid?

Correct Answer
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Write the charge balance equation for a solution that is 0.0010 M phenol(aq) .Let phenol be represented by HA(aq) .

Correct Answer
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Which of the following is the strongest acid?

Correct Answer
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E

The amino acid methionine,HOOC-CH(CH₂CH₂SCH₃) NH₃⁺,has pK_a1 = 2.2 and pK_a2 = 9.1.If this amino acid is represented by H₂L⁺,the major species at pH 6 is

Correct Answer
verified

Exam 12: Acids and Bases

Strong acids are leveled in water to the strength of the acid H3O+.

Correct AnswerverifiedShow Answer

What is the conjugate base of H2PO4- ?

Correct AnswerverifiedShow Answer

Which of the following is the strongest base?

Correct AnswerverifiedA

The Ka of phenol is 1.3 * 10-10.For a solution labeled "1.0 * 10-3 M aqueous phenol,"

Correct AnswerverifiedShow Answer

Write the autoprotolysis reaction for liquid ammonia.

Correct Answerverified2NH3(l)↔ ...View AnswerShow Answer

All of the following acids have the same strength in water except

Correct AnswerverifiedShow Answer

For a solution labeled "0.10 M H3PO4(aq) ,"

Correct AnswerverifiedShow Answer

The amino acid alanine,HOOC-CH(CH3) NH3+,has Ka1 = 4.5 * 10-3 and Ka2 = 1.4 * 10-10.Calculate α\alphaα (-OOC-CH(CH3) NH3+) at pH 3.

Correct AnswerverifiedShow Answer

The conjugate base of ammonia is

Correct AnswerverifiedShow Answer

The pH of 0.010 M aniline(aq) is 8.32.What is the percentage aniline protonated?

Correct AnswerverifiedShow Answer

The pH of 0.010 M H3PO4(aq) is 2.24; estimate the concentration of PO43- in the solution.For H3PO4,the values of Ka1,Ka2,and Ka3 are 7.6 *10-3,6.2 * 10-8,and 2.1 * 10-13,respectively.

Correct AnswerverifiedShow Answer

In a solution labeled "0.0018 M barium hydroxide" what is the molarity of OH-?

Correct AnswerverifiedShow Answer

The fractional composition diagram for the amino acid alanine is given below. Write the structure of the dominant species at pH 1,6,and 12,respectively.

Correct AnswerverifiedHOOC-CH(CH3)NH3+,-OOC-CH(CH3)NH3+ and -OOC-CH(CH3)NH2.

The following 0.1 M aqueous solutions are arranged in order of increasing pH,with the highest pH on the far right. Which one of the following 0.10 M aqueous solutions should be placed in the empty box?

Correct AnswerverifiedShow Answer

When CaO(s) is dissolved in water,which of the following is true?

Correct AnswerverifiedShow Answer

Of the following,which is the strongest acid?

Correct AnswerverifiedShow Answer

Which of the following is the weakest acid?

Correct AnswerverifiedShow Answer

Write the charge balance equation for a solution that is 0.0010 M phenol(aq) .Let phenol be represented by HA(aq) .

Correct AnswerverifiedShow Answer

Which of the following is the strongest acid?

Correct AnswerverifiedE

The amino acid methionine,HOOC-CH(CH2CH2SCH3) NH3+,has pKa1 = 2.2 and pKa2 = 9.1.If this amino acid is represented by H2L+,the major species at pH 6 is

Correct AnswerverifiedShow Answer

Strong acids are leveled in water to the strength of the acid H₃O⁺.

Correct Answer
verified

What is the conjugate base of H₂PO₄^- ?

Correct Answer
verified

Correct Answer
verified
A

The K_a of phenol is 1.3 * 10^-10.For a solution labeled "1.0 * 10^-3 M aqueous phenol,"

Correct Answer
verified

Correct Answer
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2NH₃(l)↔ ...
View Answer

Correct Answer
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For a solution labeled "0.10 M H₃PO₄(aq) ,"

Correct Answer
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The amino acid alanine,HOOC-CH(CH₃) NH₃⁺,has K_a1 = 4.5 * 10^-3 and K_a2 = 1.4 * 10^-10.Calculate $\alpha$ (^-OOC-CH(CH₃) NH₃⁺) at pH 3.

Correct Answer
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Correct Answer
verified

Correct Answer
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The pH of 0.010 M H₃PO₄(aq) is 2.24; estimate the concentration of PO₄³^- in the solution.For H₃PO₄,the values of K_a1,K_a2,and K_a3 are 7.6 10^-³,6.2 10^-⁸,and 2.1 * 10^-13,respectively.

Correct Answer
verified

In a solution labeled "0.0018 M barium hydroxide" what is the molarity of OH^-?

Correct Answer
verified

Correct Answer
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HOOC-CH(CH₃)NH₃⁺,^-OOC-CH(CH₃)NH₃⁺ and ^-OOC-CH(CH₃)NH₂.

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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Correct Answer
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E

The amino acid methionine,HOOC-CH(CH₂CH₂SCH₃) NH₃⁺,has pK_a1 = 2.2 and pK_a2 = 9.1.If this amino acid is represented by H₂L⁺,the major species at pH 6 is

Correct Answer
verified