Question 1

If a light bulb in a conductivity apparatus glows brightly when testing a solution,which of the following must be true?

Accepted Answer

A) The solution is highly ionized. 
B) The solution is slightly ionized. 
C) The solution is highly reactive. 
D) The solution is slightly reactive. 
E) none of the above 
A) The solution is highly ionized. 
B) The solution is slightly ionized. 
C) The solution is highly reactive. 
D) The solution is slightly reactive. 
E) none of the above

Question 2

What is the color of phenolphthalein indicator at pH 7?

Accepted Answer

A) red 
B) blue 
C) pink 
D) colorless 
E) none of the above 
A) red 
B) blue 
C) pink 
D) colorless 
E) none of the above

Question 3

What is the term for a solution that resists changes in pH when an acid or a base is added?

Accepted Answer

A) buffer 
B) enzyme 
C) nucleic acid 
D) peptide 
E) none of the above 
A) buffer 
B) enzyme 
C) nucleic acid 
D) peptide 
E) none of the above

Question 4

Which of the following is a general property of an acidic solution?

Accepted Answer

A) tastes sour 
B) turns litmus paper red 
C) pH less than 7 
D) neutralizes bases 
E) all of the above 
A) tastes sour 
B) turns litmus paper red 
C) pH less than 7 
D) neutralizes bases 
E) all of the above

Question 5

What is the [OH-] in an oven-cleaning solution if the pH is 12.35?

Accepted Answer

A) 0.45 M 
B) 1.65 M 
C) 0.022 M 
D) 0.000 000 000 002 2 M 
E) 0.000 000 000 000 45 M 
A) 0.45 M 
B) 1.65 M 
C) 0.022 M 
D) 0.000 000 000 002 2 M 
E) 0.000 000 000 000 45 M

Question 6

If an unknown solution is a good conductor of electricity,which of the following must be true?

Accepted Answer

A) The solution is highly ionized. 
B) The solution is slightly ionized. 
C) The solution is highly reactive. 
D) The solution is slightly reactive. 
E) none of the above 
A) The solution is highly ionized. 
B) The solution is slightly ionized. 
C) The solution is highly reactive. 
D) The solution is slightly reactive. 
E) none of the above

Question 7

A hydronium ion is a hydrogen ion bonded to which of the following?

Accepted Answer

A) hydrogen atom 
B) hydroxide ion 
C) hydrogen molecule 
D) water molecule 
E) none of the above 
A) hydrogen atom 
B) hydroxide ion 
C) hydrogen molecule 
D) water molecule 
E) none of the above

Question 8

Nitric acid is a strong acid,ammonium hydroxide is a weak base,and ammonium nitrate is a soluble salt.Which of the following is the net ionic equation for the reaction? HNO₃(aq)+ NH₄OH(aq)→ NH₄NO₃(aq)+ H₂O(l)

Accepted Answer

A) H+(aq)+ OH-(aq)→ H₂O(l) 
B) NO₃-(aq)+ NH₄+(aq)→ NH₄NO₃(aq) 
C) H+(aq)+ NH₄OH(aq)→ NH₄+(aq)+ H₂O(l) 
D) HNO₃(aq)+ OH-(aq)→ NO₃-(aq)+ H₂O(l) 
E) none of the above 
A) H+(aq)+ OH-(aq)→ H₂O(l) 
B) NO₃-(aq)+ NH₄+(aq)→ NH₄NO₃(aq) 
C) H+(aq)+ NH₄OH(aq)→ NH₄+(aq)+ H₂O(l) 
D) HNO₃(aq)+ OH-(aq)→ NO₃-(aq)+ H₂O(l) 
E) none of the above

Question 9

Which of the following is true if the hydrogen ion concentration of an aqueous solution decreases?

Accepted Answer

A) pH increases 
B) pH decreases 
C) Kw increases 
D) Kw decreases 
E) none of the above 
A) pH increases 
B) pH decreases 
C) Kw increases 
D) Kw decreases 
E) none of the above

Question 10

What is the pH of an aqueous solution if the [H+] = 0.055 M?

Accepted Answer

A) 0.74 
B) 1.26 
C) 1.74 
D) 2.26 
E) 11.74 
A) 0.74 
B) 1.26 
C) 1.74 
D) 2.26 
E) 11.74

Question 11

In the following reaction,which reactant is a Brønsted-Lowry acid? KC₂H₃O₂(aq)+ HCN(aq)→ HC₂H₃O₂(aq)+ KCN(aq)

Accepted Answer

A) KC₂H₃O₂ 
B) HCN 
C) HC₂H₃O₂ 
D) KCN 
E) none of the above 
A) KC₂H₃O₂ 
B) HCN 
C) HC₂H₃O₂ 
D) KCN 
E) none of the above

Question 12

What is the [OH-] in a seawater sample if the pH is 8.65?

Accepted Answer

A) 0.22 M 
B) 5.35 M 
C) 0.000 004 5 M 
D) 0.000 000 002 2 M 
E) 0.000 000 004 5 M 
A) 0.22 M 
B) 5.35 M 
C) 0.000 004 5 M 
D) 0.000 000 002 2 M 
E) 0.000 000 004 5 M

Question 13

What is the hydrogen ion concentration in stomach acid that registers a pH of 2 on a strip of pH paper?

Accepted Answer

A) 0.02 M 
B) 0.01 M 
C) 0.2 M 
D) 0.1 M 
E) 2 M 
A) 0.02 M 
B) 0.01 M 
C) 0.2 M 
D) 0.1 M 
E) 2 M

Question 14

What is the term for a chemical equation that results from canceling spectator ions in a total ionic equation?

Accepted Answer

A) dissociation equation 
B) ionization equation 
C) net ionic equation 
D) total ionic equation 
E) none of the above 
A) dissociation equation 
B) ionization equation 
C) net ionic equation 
D) total ionic equation 
E) none of the above

Question 15

What is the [OH-] in an ammonia solution if the pH is 10.20?

Accepted Answer

A) 0.63 M 
B) 3.80 M 
C) 0.000 16 M 
D) 0.000 000 000 16 M 
E) 0.000 000 000 063 M 
A) 0.63 M 
B) 3.80 M 
C) 0.000 16 M 
D) 0.000 000 000 16 M 
E) 0.000 000 000 063 M

Question 16

Beakers W,X,Y,and Z contain either aqueous HCl,HNO₃,H₂SO₄,or HC₂H₃O₂.Which beaker contains acetic acid if the light bulb glows brightly when testing the conductivity of beakers W,Y,and Z?

Accepted Answer

A) beaker W 
B) beaker X 
C) beaker Y 
D) beaker Z 
E) all of the above 
A) beaker W 
B) beaker X 
C) beaker Y 
D) beaker Z 
E) all of the above

Question 17

Hydrochloric acid is a strong acid and acetic acid is a weak acid.Which of the following correctly portrays aqueous solutions of the two acids?

Accepted Answer

A) HCl(aq)and HC₂H₃O₂(aq) 
B) H+(aq)+ Cl-(aq)and HC₂H₃O₂(aq) 
C) HCl(aq)and H+(aq)+ C₂H₃O₂-(aq) 
D) H+(aq)+ Cl-(aq)and H+(aq)+ C₂H₃O₂-(aq) 
E) none of the above 
A) HCl(aq)and HC₂H₃O₂(aq) 
B) H+(aq)+ Cl-(aq)and HC₂H₃O₂(aq) 
C) HCl(aq)and H+(aq)+ C₂H₃O₂-(aq) 
D) H+(aq)+ Cl-(aq)and H+(aq)+ C₂H₃O₂-(aq) 
E) none of the above

Question 18

If 30.0 mL of 0.100 M Ca(OH)2 is titrated with 0.150 M HC₂H₃O₂,what volume of acetic acid is required to neutralize the base? 2 HC₂H₃O₂(aq)+ Ca(OH)2(aq)→ Ca(C₂H₃O₂)2(aq)+ 2 H₂O(l)

Accepted Answer

A) 10.0 mL 
B) 22.5 mL 
C) 20.0 mL 
D) 40.0 mL 
E) 45.0 mL 
A) 10.0 mL 
B) 22.5 mL 
C) 20.0 mL 
D) 40.0 mL 
E) 45.0 mL

Question 19

Which of the following in aqueous solution is a strong electrolyte?

Accepted Answer

A) H₃PO₄(aq) 
B) KOH(aq) 
C) PbCl₂(s) 
D) all of the above 
E) none of the above 
A) H₃PO₄(aq) 
B) KOH(aq) 
C) PbCl₂(s) 
D) all of the above 
E) none of the above

Question 20

Given an aqueous solution in which the [H+] = 2.5 x 10-7 M,what is the molar hydroxide ion concentration?

Accepted Answer

A) [OH-] = 2.5 x 10-7 M 
B) [OH-] = 2.5 x 10-8 M 
C) [OH-] = 4.0 x 10-6 M 
D) [OH-] = 4.0 x 10-7 M 
E) [OH-] = 4.0 x 10-8 M 
A) [OH-] = 2.5 x 10-7 M 
B) [OH-] = 2.5 x 10-8 M 
C) [OH-] = 4.0 x 10-6 M 
D) [OH-] = 4.0 x 10-7 M 
E) [OH-] = 4.0 x 10-8 M

Exam 14: Acids and Bases

If a light bulb in a conductivity apparatus glows brightly when testing a solution,which of the following must be true?

What is the color of phenolphthalein indicator at pH 7?

What is the term for a solution that resists changes in pH when an acid or a base is added?

Which of the following is a general property of an acidic solution?

What is the [OH-] in an oven-cleaning solution if the pH is 12.35?

If an unknown solution is a good conductor of electricity,which of the following must be true?

A hydronium ion is a hydrogen ion bonded to which of the following?

Nitric acid is a strong acid,ammonium hydroxide is a weak base,and ammonium nitrate is a soluble salt.Which of the following is the net ionic equation for the reaction? HNO₃(aq)+ NH₄OH(aq)→ NH₄NO₃(aq)+ H₂O(l)

Which of the following is true if the hydrogen ion concentration of an aqueous solution decreases?

What is the pH of an aqueous solution if the [H+] = 0.055 M?

In the following reaction,which reactant is a Brønsted-Lowry acid? KC₂H₃O₂(aq)+ HCN(aq)→ HC₂H₃O₂(aq)+ KCN(aq)

What is the [OH-] in a seawater sample if the pH is 8.65?

What is the hydrogen ion concentration in stomach acid that registers a pH of 2 on a strip of pH paper?

What is the term for a chemical equation that results from canceling spectator ions in a total ionic equation?

What is the [OH-] in an ammonia solution if the pH is 10.20?

Beakers W,X,Y,and Z contain either aqueous HCl,HNO₃,H₂SO₄,or HC₂H₃O₂.Which beaker contains acetic acid if the light bulb glows brightly when testing the conductivity of beakers W,Y,and Z?

Hydrochloric acid is a strong acid and acetic acid is a weak acid.Which of the following correctly portrays aqueous solutions of the two acids?

If 30.0 mL of 0.100 M Ca(OH)2 is titrated with 0.150 M HC₂H₃O₂,what volume of acetic acid is required to neutralize the base? 2 HC₂H₃O₂(aq)+ Ca(OH)2(aq)→ Ca(C₂H₃O₂)2(aq)+ 2 H₂O(l)

Which of the following in aqueous solution is a strong electrolyte?

Given an aqueous solution in which the [H+] = 2.5 x 10-7 M,what is the molar hydroxide ion concentration?

Introduction to Chemistry

The Metric System

Matter and Energy

Models of the Atom

The Periodic Table

Language of Chemistry

Chemical Reactions

The Mole Concept

Chemical Equation Calculations

Gases

Liquids and Solids

Chemical Bonding

Solutions

Advanced Problem Solving

Chemical Equilibrium

Oxidation and Reduction

Nuclear Chemistry

Organic Chemistry

Biochemistry

Interlude: Prerequisite Science Skills

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