Matching (Value 5)
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Match each item with the correct statement below. a. | Henry's law | d. | supersaturated solution | b. | immiscible | e. | concentration | c. | saturated
solution |
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1.
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describes liquids that are insoluble in one another
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2.
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solution containing maximum amount of solute
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3.
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solution containing more solute than can theoretically dissolve at a given
temperature
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4.
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At a given temperature, the solubility of a gas in a liquid is directly
proportional to the pressure of the gas above the liquid.
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5.
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measure of the amount of solute dissolved in a specified quantity of
solvent
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Multiple Choice (Value 30)
Identify the choice that best completes the statement or answers
the question.
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6.
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Which of the following usually makes a substance dissolve faster in a
solvent?
a. | agitating (stirring) the solution | b. | increasing the
particle size of the solute | c. | lowering the temperature | d. | decreasing the
number of particles |
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7.
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What is the maximum amount of KCl that can dissolve in 200 g of water? (The
solubility of KCl is 34 g/100 g H 2O at 20  C.) Hint: Cross
multiplication a. | 17 g | c. | 68 g | b. | 34 g | d. | 6800 g |
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8.
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What is the solubility of silver nitrate if only 11.1 g can dissolve in 5.0 g of
water at 20  C? Hint: Cross Multiplication.
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9.
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If a crystal added to an aqueous solution causes many particles to come out of
the solution, the original solution was ____.
a. | unsaturated | c. | an emulsion | b. | saturated | d. | supersaturated |
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10.
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Which of the following occurs as temperature increases?
a. | Solubility decreases. | c. | Solubility remains the same. | b. | Solubility
increases. | d. | Molarity
doubles. |
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11.
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The solubility of a gas in a liquid is ____. Hint: Henry’s
Law
a. | proportional to the square root of the pressure of the gas above the
liquid | b. | directly proportional to the pressure of the gas above the liquid | c. | inversely
proportional to the pressure of the gas above the liquid | d. | unrelated to the
pressure of the gas above the liquid |
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12.
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If the solubility of a particular solute is  at 20  C,
which of the following solution concentrations would represent a supersaturated aqueous solution of
that solute?
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13.
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To increase the solubility of a gas at constant temperature from 1.20 g/L, at
1.4 atm, to 2.3 g/L, the pressure would have to be increased to ____. Hint: Henry’s
Law
a. | 0.37 atm | c. | 1.37 atm | b. | 0.7 atm | d. | 2.7 atm |
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14.
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If the solubility of a gas in water is 4.0 g/L when the pressure of the gas
above the water is 3.0 atm, what is the pressure of the gas above the water when the solubility of
the gas is 1.0 g/L?
a. | 0.75 atm | c. | 4.0 atm | b. | 1.3 atm | d. | 12 atm |
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15.
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In a concentrated solution there is ____.
a. | no solvent | c. | a small amount of solute | b. | a large amount of
solute | d. | no
solute |
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16.
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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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17.
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In which of the following is the solution concentration expressed in terms of
molarity?
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18.
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What is the molarity of a solution containing 7.0 moles of solute in 569 mL of
solution?
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19.
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What is the molarity of 200 mL of solution in which 2.0 moles of sodium bromide
is dissolved?
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20.
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What is the number of moles of solute in 250 mL of a 0.4M
solution?
a. | 0.1 mol | c. | 0.62 mol | b. | 0.16 mol | d. | 1.6 mol |
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21.
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What is the molarity of a solution containing 56 grams of solute in 959 mL of
solution? (molar mass of solute = 26 g/mol)
a. | 1.5M | c. | 2.1M | b. | 2.2M | d. | 0.0022M |
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22.
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What mass of sucrose, C  H  O  , is needed to make 500.0 mL of a
0.200 M solution? a. | 34.2 g | c. | 17.1 g | b. | 100 g | d. | 68.4 g |
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23.
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What mass of Na  SO  is needed to
make 2.5 L of 2.0 M solution? (Na = 23 g; S = 32 g; O = 16 g) a. | 178 g | c. | 356 g | b. | 284 g | d. | 710 g |
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24.
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What does NOT change when a solution is diluted by the addition of
solvent?
a. | volume of solvent | c. | number of moles of solute | b. | mass of
solvent | d. | molarity of
solution |
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25.
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How many mL of a 2.0M NaBr solution are needed to make 200.0 mL of
0.50M NaBr?
a. | 25 mL | c. | 100 mL | b. | 50 mL | d. | 150 mL |
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26.
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The volume of 6.00M HCl needed to make 319 mL of 6.80M HCl is
____.
a. | 0.128 mL | c. | 281 mL | b. | 7.8 mL | d. | 362 mL |
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27.
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If 2.0 mL of 6.0M HCl is used to make a 500.0-mL aqueous solution, what
is the molarity of the dilute solution?
a. | 0.024M | c. | 0.30M | b. | 0.24M | d. | 0.83M |
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28.
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To 225 mL of a 0.80M solution of KI, a student adds enough water to make
1.0 L of a more dilute KI solution. What is the molarity of the new solution?
a. | 180M | c. | 0.35M | b. | 2.8M | d. | 0.18M |
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29.
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If the percent by volume is 2.0% and the volume of solution is 250 mL, what is
the volume of solute in solution?
a. | 0.5 mL | c. | 5.0 mL | b. | 1.25 mL | d. | 12.5 mL |
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30.
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In which of the following is concentration expressed in percent by
volume?
a. | 10% (v/v) | c. | 10% (m/m) | b. | 10% (m/v) | d. | 10% |
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31.
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If the percent (mass/mass) for a solute is 4% and the mass of the solution is
200 g, what is the mass of solute in solution?
a. | 8.0 g | c. | 80 g | b. | 50 g | d. | 800 g |
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32.
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The volume of alcohol present in 620 mL of a 40.0% (v/v) solution of alcohol is
____.
a. | 372 mL | c. | 248 mL | b. | 40.0 mL | d. | 580 mL |
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33.
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How many milliliters of alcohol are in 167 mL of an 85.0% (v/v) alcohol
solution?
a. | 252 mL | c. | 145 mL | b. | 228 mL | d. | 142 mL |
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