GENERAL CHEMISTRY FINAL EXAM
PRACTICE TEST
In a solution, the solvent is ________.
A) the substance being dissolved
B) always a liquid
C) the substance present in the greatest amount
D) always water
E) never a gas - Correct Answers -C) the substance present in the greatest amount
In a solution, solutes ________.
A) must be liquids
B) can be liquids or gases
C) cannot be solids
D) can be solids, liquids or gases
E) must be solids or gases - Correct Answers -D) can be solids, liquids or gases
Calculate the volume (in mL) of a 2.75 M solution that must be used to make 1.25 L of a
0.150 M solution.
A) 0.0682 mL
B) 68.2 mL
C) 0.0330 mL
D) 33.0 mL
E) 330 mL - Correct Answers -B) 68.2 mL
If 250 mL of 4.00 M CaBr2 is diluted to 1.60 L, the resulting solution contains ________.
A) 0.400 mole of CaBr2
B) 1.00 mole of CaBr2
C) 2.40 moles of CaBr2
D) 100 mole of CaBr2
E) 0.0500 moles of CaBr2 - Correct Answers -B) 1.00 mole of CaBr2
A solution is always characterized by each of the following except one. The exception is
________.
A) homogeneity
B) variable composition
C) absence of settling
D) liquid state - Correct Answers -D) liquid state
, In a mixture of 66 mL water, 75 mL ethyl alcohol, and 59 mL of acetone, the solvent is
________.
A) ethyl alcohol
B) water
C) acetone
D) acetone and ethyl alcohol
E) ethyl alcohol and water - Correct Answers -A) ethyl alcohol
A crystal of solid NaCl is placed into an aqueous NaCl solution. NO precipitate forms in
the bottom of the container. The final solution ________.
A) is super saturated
B) is unsaturated
C) is slightly saturated
D) is saturated
E) might be saturated, or it might be unsaturated - Correct Answers -E) might be
saturated, or it might be unsaturated
A solution in which the rate of crystallization is equal to the rate of dissolution is
________.
A) unsaturated
B) saturated
C) supersaturated
D) dilute
E) unstable - Correct Answers -B) saturated
A supersaturated solution:
A) contains as much solvent as it can hold
B) contains no double bonds
C) contains dissolved solute in equilibrium with undissolved solid
D) will rapidly precipitate if a seed crystal is added. - Correct Answers -D) will rapidly
precipitate if a seed crystal is added.
Water and methanol are two liquids which dissolve in each other. When the two are
mixed they form one layer. The liquids are ________.
A) miscible
B) immiscible
C) unsaturated
D) partially miscible
E) unstable - Correct Answers -A) miscible
An aqueous solution contains 38.6 g NaCl per 755 mL of solution. This solution is
________.
A) 1.09 M
B) 2.41 M
C) 0.49 M
D) 2.57 M
PRACTICE TEST
In a solution, the solvent is ________.
A) the substance being dissolved
B) always a liquid
C) the substance present in the greatest amount
D) always water
E) never a gas - Correct Answers -C) the substance present in the greatest amount
In a solution, solutes ________.
A) must be liquids
B) can be liquids or gases
C) cannot be solids
D) can be solids, liquids or gases
E) must be solids or gases - Correct Answers -D) can be solids, liquids or gases
Calculate the volume (in mL) of a 2.75 M solution that must be used to make 1.25 L of a
0.150 M solution.
A) 0.0682 mL
B) 68.2 mL
C) 0.0330 mL
D) 33.0 mL
E) 330 mL - Correct Answers -B) 68.2 mL
If 250 mL of 4.00 M CaBr2 is diluted to 1.60 L, the resulting solution contains ________.
A) 0.400 mole of CaBr2
B) 1.00 mole of CaBr2
C) 2.40 moles of CaBr2
D) 100 mole of CaBr2
E) 0.0500 moles of CaBr2 - Correct Answers -B) 1.00 mole of CaBr2
A solution is always characterized by each of the following except one. The exception is
________.
A) homogeneity
B) variable composition
C) absence of settling
D) liquid state - Correct Answers -D) liquid state
, In a mixture of 66 mL water, 75 mL ethyl alcohol, and 59 mL of acetone, the solvent is
________.
A) ethyl alcohol
B) water
C) acetone
D) acetone and ethyl alcohol
E) ethyl alcohol and water - Correct Answers -A) ethyl alcohol
A crystal of solid NaCl is placed into an aqueous NaCl solution. NO precipitate forms in
the bottom of the container. The final solution ________.
A) is super saturated
B) is unsaturated
C) is slightly saturated
D) is saturated
E) might be saturated, or it might be unsaturated - Correct Answers -E) might be
saturated, or it might be unsaturated
A solution in which the rate of crystallization is equal to the rate of dissolution is
________.
A) unsaturated
B) saturated
C) supersaturated
D) dilute
E) unstable - Correct Answers -B) saturated
A supersaturated solution:
A) contains as much solvent as it can hold
B) contains no double bonds
C) contains dissolved solute in equilibrium with undissolved solid
D) will rapidly precipitate if a seed crystal is added. - Correct Answers -D) will rapidly
precipitate if a seed crystal is added.
Water and methanol are two liquids which dissolve in each other. When the two are
mixed they form one layer. The liquids are ________.
A) miscible
B) immiscible
C) unsaturated
D) partially miscible
E) unstable - Correct Answers -A) miscible
An aqueous solution contains 38.6 g NaCl per 755 mL of solution. This solution is
________.
A) 1.09 M
B) 2.41 M
C) 0.49 M
D) 2.57 M
