Practice Test Answers

A can of soda contains many ingredients, including vanilla, caffeine, sugar, and water. Which ingredient is the solvent?

A

water

B

caffeine

C

sugar

D

vanilla

22

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Which substances will cause the greatest temperature change if the same amount of each substance is added to 1 point 0 kilograms of water?

A

FeCl sub 3

B

KBr

C

cap c sub 6 cap h sub 12 cap o sub 6

D

Na sub 2 SO sub 4

23

Which term refers to the formation of ions as a result of a chemical reaction?

A

hydration

B

ionization

C

electrolyte

D

dissociation

24

Which represents a double replacement reaction and would occur?

A

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

B

Na sub 2 CO sub 3 aq plus CaCl sub 2 times aq rightarrow 2 NaCl aq plus CaCO sub 3 times s

C

NaCl times aq rightarrow Na raised to the plus aq power plus Cl raised to the negative aq power

D

NaF times aq plus KCl times aq rightarrow NaCl times aq plus KCl times aq

25

Which best defines concentration ?

A

ratio that describes the amount of solvent or solution divided by the amount of solute

B

ratio that describes the amount of solute divided by the amount of solvent or solution

C

ratio that describes the mass of solute divided by the mass of solvent

D

ratio that describes the amount of solvent in a solution

26

A solution contains 90 milliliters of methanol, 18 milliliters of propanol, and 2 milliliters of diethyl ether. Which is the solvent in this solution?

A

methanol

B

propanol

C

water

D

diethyl ether

27

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

28

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

A

Water molecules surround solute molecules.

B

Solute molecules repel water molecules.

C

Solute molecules remain concentrated in one part of the solvent.

D

Water molecules are strongly attracted to nonpolar substances.

29

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

A

Solute molecules remain concentrated in one part of the solvent.

B

Water molecules surround solute molecules.

C

Water molecules are strongly attracted to nonpolar substances.

D

Solute molecules repel water molecules.

30

Which term refers to the formation of ions as a result of a chemical reaction?

A

dissociation

B

hydration

C

ionization

D

electrolyte

31

A 150 milliliters sample of hydrochloric acid HCl completely reacted with 60 point 0 milliliters of a 0 point 1 0 0 cap m NaOH solution. The equation for the reaction is given. HCl plus NaOH rightarrow NaCl plus cap h sub 2 cap o What was the original concentration of the HCl solution?

A

0 point 2 5 cap m

B

1 point 5 0 cap m

C

2 point 5 0 cap m

D

0 point 0 4 0 cap m

32

Which represents a double replacement reaction and would occur?

A

NaF times aq plus KCl times aq rightarrow NaCl times aq plus KCl times aq

B

NaCl times aq rightarrow Na raised to the plus aq power plus Cl raised to the negative aq power

C

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

D

Na sub 2 CO sub 3 aq plus CaCl sub 2 times aq rightarrow 2 NaCl aq plus CaCO sub 3 times s

33

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

A

Solute molecules remain concentrated in one part of the solvent.

B

Water molecules are strongly attracted to nonpolar substances.

C

Solute molecules repel water molecules.

D

Water molecules surround solute molecules.

34

A solution contains 90 milliliters of methanol, 18 milliliters of propanol, and 2 milliliters of diethyl ether. Which is the solvent in this solution?

A

propanol

B

methanol

C

water

D

diethyl ether

35

A 150 milliliters sample of hydrochloric acid HCl completely reacted with 60 point 0 milliliters of a 0 point 1 0 0 cap m NaOH solution. The equation for the reaction is given. HCl plus NaOH rightarrow NaCl plus cap h sub 2 cap o What was the original concentration of the HCl solution?

A

2 point 5 0 cap m

B

0 point 0 4 0 cap m

C

1 point 5 0 cap m

D

0 point 2 5 cap m

36

The molality of a solution that is made by dissolving a certain mass of benzene in 20 point 6 g of carbon tetrachloride is 0 point 5 2 9 m How many moles of benzene were dissolved? Use molality is equal to moles of solute over kilograms of solvent

A

0 point 0 1 0 9 mol

B

10 point 9 mol

C

0 point 0 3 8 9 mol

D

25 point 7 mol

37

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

38

The molality of a solution that was made by dissolving NaCl in 1 point 5 kilograms of water is 0 point 4 0 m If the molar mass of NaCl is 58 point 4 4 g over mol , what is the mass of NaCl that was dissolved? Use molality is equal to moles of solute over kilograms of solvent

A

0 point 2 7 g

B

35 g

C

23 g

D

39 g

39

The molality of a solution that was made by dissolving NaCl in 1 point 5 kilograms of water is 0 point 4 0 m If the molar mass of NaCl is 58 point 4 4 g over mol , what is the mass of NaCl that was dissolved? Use molality is equal to moles of solute over kilograms of solvent

A

0 point 2 7 g

B

35 g

C

23 g

D

39 g

40

The molality of a solution that was made by dissolving NaCl in 1 point 5 kilograms of water is 0 point 4 0 m If the molar mass of NaCl is 58 point 4 4 g over mol , what is the mass of NaCl that was dissolved? Use molality is equal to moles of solute over kilograms of solvent

A

0 point 2 7 g

B

23 g

C

35 g

D

39 g

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