1) Determine the mass of potassium chloride required to prepare a saturated solution in 50.0 mL of water at 40°C.
a) 40 g b) 20 g c) 10 g d) 45 g
2) A solution containing 50.0 g of ammonium chloride in 100.0 mL of water at 60°C is
a) saturated. b) unsaturated. c) supersaturated.
3) For which of the following solutes would dissolving 40 g in 100 g of water result in an unsaturated solution at 30°C?
a) KNO3 b) NI-14C1 c) KCl d) KCIO3
4) Which phase of matter can act as a solvent?
a) solid b) liquid c) gas ci) X11 of these choices
5) A solution is a
a) homogeneous compound. b) heterogeneous compou
6) Which liquid is miscible with wa
a) carbon tetrachloride thyl alcohol
0) bromine oil mogeneous mixture d) heterogeneous mixture.
7) The solubility of ammonium chloride at 70. °C is 60. g of solute per 100. g of water. Which solution would be saturated at 70. C?
a) 90. g of solute in 180. g of water
b) 90 .g of solute in 200. g of water
c) 30. g of solute in 50. g of water
d) 35 g of solute in 50. g of water
8) As temperature decreases, the solubility of most solids in water
a) increases. b) decreases. c) remains the same.
9) As temperature decreases, the solubility of a gas in water
a) inreases. b) decreases. c) remains the same.
10) Which of the following is correct?
a) Concentration of a solid in a solution is directly proportional to its pressure.
b) Concentration of a gas in a solution is directly proportional to its temperature.
c) Concentration of a solid in a solution is directly proportional to its temperature. oncentration of a gas in a solution is directly proportional to its pressure.
11) As solute surface area increases, the rate of dissolving
a) increases. b) decreases. c) remains the same.
12) The freezing point of pure water is 273 K. As a solute dissolves in water, the freezing point of the solution will
a) increase. (b) rease. c) remains the same.
13) The normal boiling point of pure water is 373 K. As a solute dissolves in water, the boiling point of the solo will
b) decrease. c) remains the same.
14) Which of the following solutions will have the highest boiling point?
a) 1.0 g of NaCI in 100 g of water
b) 1.0 g of ICNO3 in 100 g of water
c) 1.0 g of NaC2H302 in 100 g of water
d) All the solutions will have the same boiling point.
Which of the following would most likely increase the solubility of a solid in water?
a) Stirring b) increase the surface area of the solid c) increase the pressure d) increase the temperature
16) Liquids which are capable of mixing and forming a solution are
a) unsaturated. b)dilute
c) iscible. d) immiscible.
17) As more solute is added to a saturated solution, the concentration of the solution increases.
18) Freezing point depression, boiling point elevation, and osmotic pressure are all colligative T or
19) When a solution is diluted by adding more solvent, the number of moles of solute remains constant.
20) What is the percent by mass of the solution formed when 5.0 g of solute is dissolved in 40. g of water?
a) 8.0 %
b) 11 %
c) 13 %
d) 14 %
21) What is the percent by mass of a solution formed by dissolving 50.0 g of glucose in 1000. g of water?
a) 4.76 %
b) 5.00 %
c) 5.26 %
d) 50.0 %
22) How many moles of solute are dissolved in 400. mL of a 0.200 M solution?
a) 0.0800 mol
b) 0.800 mol
c) 8.00 mol
d) 80.0 mol
23) What is the molarity of the resulting solution if 300. mL of a 0.400 M solution is diluted to 800. mL?
a) 0.109 M
b) 0.150 M
c) 1.07 M
d) 1.47 M
24) What is the molarity of a solution in which 4.00 mol of potassium chloride is dissolved in 3.00 L. of solution?
a) 1.33 M
b) 6.00 M
c) 2.67 M
d) 4.00 M
25) What is the molarity of a solution in which 55.49 g of calcium chloride is dissolved in enough water to make 500. mL of'solution?
a) 0.500 M
b) 1.00 M
c) 2.00 M
d) 4.00 M