AnswersCrowley Original Credit Chemistry BNeutralization Reactions

Neutralization Reactions — Cumulative exam Answers

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Which value is most likely to be the pH of a salt solution that is formed by the reaction of a strong acid and a weak base?

A
2.0
B
7.0
C
8.0
D
10.0
2
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Which of the following shows a Bronsted-Lowry acid reacting?

A
CO + NO2 CO2 + NO
Option A
B
NH3 + H+ NH4+
Option B
C
+ H+ HCO3–
Option C
D
HCl + H2O H3O+ + Cl–
Option D
3

Which value is most likely to be the pH of a salt solution that is formed by the reaction of a weak acid and a strong base?

A
2.0
B
6.8
C
7.0
D
8.7
4

The reaction of a Lewis acid with a Lewis base would most likely be accompanied by an increase in which item?

A
covalent bonds
B
hydronium ions
C
electron pairs
D
hydroxide ions
5

Pure water at 25°C

A
ionizes in the presence of acid to form an equilibrium in which
Option A
B
ionizes in the presence of acid to form an equilibrium in which
Option B
C
self-ionizes to form an equilibrium in which
Option C
D
self-ionizes to form an equilibrium in which
Option D
6

Which is the first step in the dissolving process?

A
The solute becomes like the solvent.
B
The solute molecules are carried into the solution.
C
The solvent molecules surround the solute particles.
D
The solvent molecules are attracted to particles at the surface of the solute.
7

Ca(OH)2 is added to a large beaker of water. How is the solution different from the original water?

A
The solution turns blue litmus to red.
B
The solution turns phenolphthalein pink.
C
The solution has more hydrogen ions.
D
The solution has fewer hydroxide ions.
8

Catalysts are used in the oil industry to increase octane ratings in gasoline. Octane ratings tell how much fuel has to be compressed to promote better fuel ignition in some cars. Which of the following catalytic effects would be most beneficial for the oil industry?

A
Higher temperatures and pressures can be used.
B
Lower temperatures and pressures can be used.
C
Less product can be formed from a given amount of material.
D
More product can be formed from a given amount of material.
9

The pOH of a solution is 6.0. Which statement is correct?Use and .

Question illustration
A
The pH of the solution is 20.0.
B
The concentration of OH– ions is .
Option B
C
The concentration of OH– ions is .
Option C
D
The pH of the solution is 8.0.
10

What is a common use of bases?

A
as a component of vinegar
B
as a component of car batteries
C
to make foods tart
D
to reduce indigestion
11

Water is dissolved into n-butanol (a polar liquid). Which is the second step at the molecular level as water dissolves into n-butanol?

A
n-Butanol mixes with water.
B
Water molecules are carried into n-butanol.
C
n-Butanol molecules surround water molecules.
D
n-Butanol molecules are attracted to the surface of the water molecules.
12

According to the collision theory, which is required for a high number of effective collisions?

A
a very low amount of force from colliding molecules
B
a very low amount of kinetic energy from colliding molecules
C
molecular collisions that have very specific orientations
D
molecular collisions with energy to overcome activation energy
13

Consider the energy diagram below.Which statement best describes the diagram?

Question illustration
A
The pathway A-B-D involves a catalyst and is slower than A-C-D.
B
The pathway A-B-D involves a catalyst and is faster than A-C-D.
C
The pathway A-C-D involves a catalyst and is slower than A-B-D.
D
The pathway A-C-D involves a catalyst and is faster than A-B-D.
14

In an experiment, a student wants to increase the rate of a reaction that involves gases. Which change to the reactants would accomplish this?

A
Increase the volume to decrease pressure and to increase concentration.
B
Increase the volume to increase pressure and to decrease concentration.
C
Decrease the volume to decrease pressure and to increase concentration.
D
Decrease the volume to increase pressure and to increase concentration.
15

A sample of water is taken and kept in a beaker in a freezer at a constant temperature of 0°C. If the system is at dynamic equilibrium, which of these statements is true?

A
The rate of freezing is equal to the rate of melting.
B
The rate of freezing is greater than the rate of melting.
C
The amount of ice is greater than the amount of water.
D
The amount of ice is equal to the amount of water.
16

Consider the following reversible reaction.What is the equilibrium constant expression for the given system?

Question illustration
A
mc031-2.jpg
Option A
B
K subscript e q equals StartFraction StartBracket upper C upper O subscript 2 EndBracket over StartBracket upper O subscript 2 EndBracket EndFraction.
Option B
C
K subscript e q equals StartFraction StartBracket upper C EndBracket StartBracket upper O subscript 2 EndBracket over StartBracket upper C upper O subscript 2 EndBracket EndFraction.
Option C
D
K subscript e q equals StartFraction StartBracket upper O subscript 2 EndBracket over StartBracket upper C upper O subscript 2 EndBracket EndFraction.
Option D
17

Which statement is correct?

A
Salts are formed by the reaction of bases with water.
B
Most salts are ionic and are soluble in water.
C
Most salts are insoluble in water and lack electrical charges.
D
Solutions of salt and water do not conduct electricity.
18

Use the following table to answer the question.Strong acidsWeak acidsWeak basesStrong basesHBrCH3COOHNH3NaOHHNO3HFNH4OHKOHH2SO4HCN Ca(OH)2Which reaction would yield a neutral salt?

A
mc010-1.jpg
Option A
B
mc010-2.jpg
Option B
C
mc010-3.jpg
Option C
D
mc010-4.jpg
Option D
19

Which compound plays an important role in leather processing and electroplating?

A
nitric acid
B
hydrochloric acid
C
ammonia
D
magnesium hydroxide
20

Consider the equilibrium system below.If the system is at dynamic equilibrium, which statement is true?

Question illustration
A
Sublimation of the NH4CI crystals stops.
B
Solidification of the NH4CI vapors stops.
C
The rate of sublimation of the NH4CI crystals is equal to the rate of solidification of the NH4CI vapors.
D
The rate of sublimation of the NH4CI crystals is higher than the rate of solidification of the NH4CI vapors.

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