AnswersChemistryMixtures, Solutions, and Solubility

Practice Test Answers

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Which of these factors will cause a solid solute to dissolve faster?

A
increasing the amount of solute
B
increasing the amount of solvent
C
increasing the air temperature
D
increasing the surface area of solute
4

Which statement accurately describes part of the dissolving process of a polar solute in water?

A
Water molecules are strongly attracted to nonpolar substances.
B
Solute molecules remain concentrated in one part of the solvent.
C
Water molecules surround solute molecules.
D
Solute molecules repel water molecules.
6

Which represents a double replacement reaction and would occur?

A
Na sub 2 CO sub 3 aq plus CaCl sub 2 times aq rightarrow 2 NaCl aq plus CaCO sub 3 times s
B
NaF times aq plus KCl times aq rightarrow NaCl times aq plus KCl times aq
C
NaCl times aq rightarrow Na raised to the plus aq power plus Cl raised to the negative aq power
D
NH sub 4 NO sub 3 aq plus AgClO sub 3 times aq rightarrow AgNO sub 3 times aq plus NH sub 4 CIO sub 3 aq
7

Which best defines concentration ?

A
ratio that describes the mass of solute divided by the mass of solvent
B
ratio that describes the amount of solvent in a solution
C
ratio that describes the amount of solute divided by the amount of solvent or solution
D
ratio that describes the amount of solvent or solution divided by the amount of solute
12

Which of the following best explains freezing point depression ?

A
the decrease in the freezing point of a solution as a function of the number of particles that are dissolved in the solution
B
the increase in the freezing point of a solution as a function of the number of particles that are dissolved in the solution
C
the temperature at which the vapor pressure of a liquid equals the atmospheric pressure
D
the increase in the boiling point of a solution as a function of the number of particles that are dissolved in the solution

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