Question 1

What is the H+ ion concentration in a 2.1 × 10-4 M Ca(OH) 2 solution?

Accepted Answer

A)  7.3 × 10-4 M
B)  4.2 × 10-4 M
C)  2.1 × 10-4 M
D)  2.4 × 10-11 M
E)  4.8 × 10-11 M

Question 2

Farmers who raise cotton once used arsenic acid,H3AsO4,as a defoliant at harvest time.Arsenic acid is a polyprotic acid with Ka1 = 2.5 × 10-4,Ka2 = 5.6 × 10-8,and Ka3 = 3 × 10-13.What is the pH of a 0.500 M solution of arsenic acid?

Accepted Answer

A)  0.85
B)  1.95
C)  3.90
D)  4.51
E)  None of these choices is correct.

Question 3

What is the conjugate acid of NH3?

Accepted Answer

A)  NH2
B)  NH2+
C)  NH2-
D)  NH4
E)  NH4+

Question 4

HCN is classified as a weak acid in water.What does this classification mean?

Accepted Answer

A relatively small f...

Question 5

What is the concentration of OH- in a 1.0 × 10-3 M Ba(OH) 2 solution?

Accepted Answer

A)  0.50 × 10-3 M
B)  1.0 × 10-3 M
C)  2.0 × 10-3 M
D)  1.0 × 10-2 M
E)  3.3 × 10-4 M

Question 6

Which one of the following is a strong base?

Accepted Answer

A)  LiOH
B)  CH3COOH
C)  NH3
D)  H3PO4
E)  HClO2

Question 7

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 Na3PO4 therefore would be _____.

Accepted Answer

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

Question 8

Which is a Lewis base?

Accepted Answer

A)  BCl3
B)  Cu2+
C)  Cl-
D)  Mn2+
E)  NH4+

Question 9

What is the pOH of a 0.025 M HI solution?

Accepted Answer

A)  0.025
B)  0.94
C)  1.60
D)  12.40
E)  10.31

Question 10

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

Accepted Answer

A)  Arrhenius acid
B)  Arrhenius base
C)  Brønsted acid
D)  Brønsted base
E)  Lewis base

Question 11

Hydroxylamine,HONH2,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has Kb = 9.1 × 10-9.What is the pH of a 0.025 M HONH2 solution?

Accepted Answer

A)  2.90
B)  4.82
C)  9.18
D)  9.91
E)  11.10

Question 12

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

Accepted Answer

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

Question 13

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.

Exam 16: Acids and Bases

The substance NH₃ is considered to be

Correct Answer
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Which one of the following is a strong base?

Correct Answer
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What is the conjugate acid of NH₃?

Correct Answer
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Farmers who raise cotton once used arsenic acid,H₃AsO₄,as a defoliant at harvest time.Arsenic acid is a polyprotic acid with K_a1 = 2.5 × 10^-⁴,K_a2 = 5.6 × 10^-⁸,and K_a3 = 3 × 10^-¹³.What is the pH of a 0.500 M solution of arsenic acid?

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

Correct Answer
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Hydroxylamine,HONH₂,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has K_b = 9.1 × 10^-⁹.What is the pH of a 0.025 M HONH₂solution?

Correct Answer
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HCN is classified as a weak acid in water.What does this classification mean?

Correct Answer
verified
A relatively small f...
View Answer

What is the concentration of OH^- in a 1.0 × 10^-³ M Ba(OH) ₂ solution?

Correct Answer
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What is the pOH of a 0.025 M HI solution?

Correct Answer
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Which is a Lewis base?

Correct Answer
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For H₃PO₄,K_a₁ = 7.3 × 10^-³,K_a₂ = 6.2 × 10^-⁶,and K_a₃ = 4.8 × 10^-₁₃.A 0.10 M aqueous solution of Na₃PO₄ therefore would be _____.

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

Correct Answer
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What is the H⁺ ion concentration in a 2.1 × 10^-4 M Ca(OH) ₂ solution?

Correct Answer
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Exam 16: Acids and Bases

The substance NH3 is considered to be

Correct AnswerverifiedShow Answer

Which one of the following is a strong base?

Correct AnswerverifiedShow Answer

What is the conjugate acid of NH3?

Correct AnswerverifiedShow Answer

Farmers who raise cotton once used arsenic acid,H3AsO4,as a defoliant at harvest time.Arsenic acid is a polyprotic acid with Ka1 = 2.5 × 10-4,Ka2 = 5.6 × 10-8,and Ka3 = 3 × 10-13.What is the pH of a 0.500 M solution of arsenic acid?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Hydroxylamine,HONH2,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has Kb = 9.1 × 10-9.What is the pH of a 0.025 M HONH2 solution?

Correct AnswerverifiedShow Answer

HCN is classified as a weak acid in water.What does this classification mean?

Correct AnswerverifiedA relatively small f...View AnswerShow Answer

What is the concentration of OH- in a 1.0 × 10-3 M Ba(OH) 2 solution?

Correct AnswerverifiedShow Answer

What is the pOH of a 0.025 M HI solution?

Correct AnswerverifiedShow Answer

Which is a Lewis base?

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 Na3PO4 therefore would be _____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the H+ ion concentration in a 2.1 × 10-4 M Ca(OH) 2 solution?

Correct AnswerverifiedShow Answer

The substance NH₃ is considered to be

Correct Answer
verified

Correct Answer
verified

What is the conjugate acid of NH₃?

Correct Answer
verified

Farmers who raise cotton once used arsenic acid,H₃AsO₄,as a defoliant at harvest time.Arsenic acid is a polyprotic acid with K_a1 = 2.5 × 10^-⁴,K_a2 = 5.6 × 10^-⁸,and K_a3 = 3 × 10^-¹³.What is the pH of a 0.500 M solution of arsenic acid?

Correct Answer
verified

Correct Answer
verified

Hydroxylamine,HONH₂,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has K_b = 9.1 × 10^-⁹.What is the pH of a 0.025 M HONH₂solution?

Correct Answer
verified

Correct Answer
verified
A relatively small f...
View Answer

What is the concentration of OH^- in a 1.0 × 10^-³ M Ba(OH) ₂ solution?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For H₃PO₄,K_a₁ = 7.3 × 10^-³,K_a₂ = 6.2 × 10^-⁶,and K_a₃ = 4.8 × 10^-₁₃.A 0.10 M aqueous solution of Na₃PO₄ therefore would be _____.

Correct Answer
verified

Correct Answer
verified

What is the H⁺ ion concentration in a 2.1 × 10^-4 M Ca(OH) ₂ solution?

Correct Answer
verified