Ch. 15 Prep-Test Per 3
Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Carbon dioxide in water is an example of which solute-solvent
combination?
a. | gas-liquid | c. | liquid-liquid | b. | liquid-gas | d. | cannot be
determined |
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2.
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A KCl solution contains 149.1 g of KCl (molar mass 74.55 g/mol) in 4000 mL of
solution. What units do the amount of solute and the volume of solution need to be in to obtain
the molarity of 0.5 M?
a. | mol and L | c. | grams and L | b. | grams and mol | d. | mol and cubic
centimeters |
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3.
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How many moles of HCl are present in 0.50 L of a 2 M HCl solution?
a. | 1.0 mol | c. | 0.5 mol | b. | 2.0 mol | d. | 2.0 mol |
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4.
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30 g of KCl at 50 °C in 100g of water would be considered a(n) _________
solution.
a. | saturated | c. | supersaturated | b. | unsaturated | d. | none of these |
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5.
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85 g of NaNO3 at 15 °C in 100 g of water would be considered
a(n) _________ solution.
a. | saturated | c. | supersaturated | b. | unsaturated | d. | none of these |
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6.
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What is the molarity of 200 mL of solution in which 2.0 moles of sodium bromide
is dissolved?
a. | 2.0 M | c. | 0.40 M | b. | 10 M | d. | 4.0 M |
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7.
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Pressure has the greatest effect on the solubility of
a. | solids in liquids. | c. | gases in gases. | b. | liquids in liquids. | d. | gases in
liquids. |
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8.
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What is the molarity of a solution that contains 20. g NaOH in 4.00 L
solution?
a. | 0.13 M | c. | 8.0 M | b. | 0.50 M | d. | 20 M |
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9.
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What is the molarity of a solution that contains 6 moles of solute in 2 liters
of solution?
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10.
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Stirring increases the rate of dissolution because it
a. | raises the temperature. | b. | lowers the temperature. | c. | brings fresh solvent
into contact with the solute. | d. | decreases surface area of the
solute. |
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11.
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If the amount of solute present in a solution at a given temperature is less
than the maximum amount that can dissolve at that temperature, the solution is said to be
a. | saturated. | c. | supersaturated. | b. | unsaturated. | d. | concentrated. |
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12.
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Which of the following is an example of a polar solvent?
a. | carbon tetrachloride | c. | water | b. | benzene | d. | gasoline |
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13.
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What is the molarity of a solution that contains 1.5 mol KCl in 3.00 L
solution?
a. | 0.5 M | c. | 0.4 M | b. | 4.5 M | d. | 1.5 M |
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14.
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A metal solution is a(n)
a. | colloid. | c. | suspension. | b. | alloy. | d. | electrolyte. |
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15.
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Sugar is soluble in water because sugar molecules are
a. | massive. | c. | nonpolar. | b. | large. | d. | polar. |
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16.
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A solution of sugar contains 35 grams of sucrose,
C12H22O11 in 100 mL of solution. What is the concentration in parts
per million of the solution?
a. | 25 ppm | c. | 5,000,000 ppm | b. | 350,000 ppm | d. | 0.76 ppm |
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17.
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Which of the following is NOT a proper unit for measuring concentration?
a. | mol/L | c. | mol/M | b. | g solute/g soln | d. | g solute/g soln x 106
(ppm) |
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18.
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Which of the following usually makes a substance dissolve faster in a
solvent?
a. | agitating the solution | b. | increasing the particle size of the
solute | c. | lowering the temperature | d. | decreasing the number of
particles |
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19.
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Which of the following is an example of a nonpolar solvent?
a. | water | c. | both a and b | b. | carbon tetrachloride | d. | neither a nor b |
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20.
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An NaOH solution contains 2 mol of NaOH, and its concentration is 0.5 M. What is
its volume?
a. | 0.5 L | c. | 1.05 L | b. | 0.2 L | d. | 4.0 L |
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21.
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Which of the following is soluble in water?
a. | potassium nitrate | c. | benzene | b. | silver | d. | carbon
tetrachloride |
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22.
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Increasing the surface area between solute and solvent
a. | increases the rate of dissolution. | b. | decreases the rate of
dissolution. | c. | has no effect on the rate of dissolution. | d. | can increase,
decrease, or have no effect on the rate of dissolution. |
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23.
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What is the percent composition (g solute/g soln. x100) of 40g NaOH in 2.0 L of
solution? (1.0 mL H2O = 1.0 g H2O)
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24.
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What is the concentration in g/L of 2.00 mol of
C6H12O6 in 36.0 L of solution?
a. | 0.100 g/L | c. | 10.0 g/L | b. | 10.0 M | d. | 10.0 % |
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25.
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Why is salt thrown down on icy roads in the winter?
a. | salt heats up the ice to melt it | c. | salt lowers the pH of
water | b. | salt dissolves in the ice breaking down its structure | d. | salt preserves the ice from damaging
bacteria |
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Matching
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a. | Solution | d. | Dilute | b. | Colligative properties | e. | Molarity | c. | Like dissolves
like |
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26.
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Boiling Point elevation and Freezing Point depression caused by...
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27.
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Homogeneous mixture
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28.
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Small amount of solute dissolved in large amount of solvent
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29.
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M = mol/L
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30.
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Statement describing which type of solutes will dissolve in which type of
solvents
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