Chapter 12 – Physical Properties of Solutions
Chapter 12
Physical Properties of Solutions
1. A saturated solution
Chapter 12 – Physical Properties of Solutions
2.
Which one of the following would be immiscible with water?
Chapter 12 – Physical Properties of Solutions
3. The heat of solution
Chapter 12 – Physical Properties of Solutions
4. Which response lists all the following pairs that are miscible liquids?
Pair #1: octane (C8H18) and water
Pair #2: acetic acid (CH3COOH) and water
Pair #3: octane (C8H18) and carbon tetrachloride(CCl4)
5. In which of the following solvents would you expect KBr to be most soluble?
Chapter 12 – Physical Properties of Solutions
6. Which of the following liquids would make a good solvent for iodine, I2?
7. Which of the following compounds should be soluble in CCl4?
Chapter 12 – Physical Properties of Solutions
8. An endothermic solution process is described by which of the following?
Chapter 12 – Physical Properties of Solutions
9. An exothermic solution process is described by which of the following?
10. Calculate the mole fraction of KI in a solution made by dissolving 3.4 g of KI in 5.8 g of
water.
Chapter 12 – Physical Properties of Solutions
11. Calculate the mass percent of HOCH2CH2OH in a solution made by dissolving 3.2 g of
HOCH2CH2OH in 43.5g of water.
12. A 9.50 % by mass solution of acetone (C3H6O) in water has a density of 0.9849 g/mL at
20C. What is the molarity of this solution?
Chapter 12 – Physical Properties of Solutions
13. A 15.00 % by mass solution of lactose (C12H22O11, 342.30 g/mol) in water has a density of
1.0602 g/mL at 20C. What is the molarity of this solution?
14. A 20.0 % by mass solution of phosphoric acid (H3PO4) in water has a density of 1.114
g/mL at 20C. What is the molarity of this solution?
Chapter 12 – Physical Properties of Solutions
15. Which of the following gives the molarity of a 17.0% by mass solution of sodium acetate,
CH3COONa (molar mass = 82.0 g/mol) in water? The density of the solution is 1.09 g/mL.
16. What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a
density of 1.071 g/mL?
17. A solution that is 33.6 % by mass of phenol (C6H5OH) in water is prepared. What is the
mole fraction of the phenol?
18. A 1.35 m solution of NaOCl in water is prepared. What is the mole fraction of the
NaOCl?
Chapter 12 – Physical Properties of Solutions
19. What is the molality of an aqueous KBr solution with a mole fraction of KBr, X, equal to
0.245?
20. What is the percent by mass of a Na2SO4 solution in water with a mole fraction of
Na2SO4, X = 0.350?
21. A 23.0% by mass LiCl solution is prepared in water. What is the mole fraction of the
water?
22. What is the percent CdSO4 by mass in a 1.00 m aqueous CdSO4 solution?
Chapter 12 – Physical Properties of Solutions
23. Determine the mass percent HCl in a 1.2 M solution of hydrochloric acid with a density of
1.019 g/mL.
24. What is the percent CsCl by mass in a 0.711 M CsCl solution that has a density of 1.091
g/mL?
Chapter 12 – Physical Properties of Solutions
25. Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3
and 295 mL of water. The density of water is 0.997 g/mL.
26. How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH4NO3 in
order to prepare a 0.452 m solution?
Chapter 12 – Physical Properties of Solutions
27. In how many grams of water should 25.31 g of potassium nitrate (KNO3) be dissolved to
prepare a 0.1982 m solution?
28. Calculate the molality of a solution containing 14.3 g of NaCl in 42.2 g of water.
29. What is the molality of a solution that is 3.68 % by mass calcium chloride?
Chapter 12 – Physical Properties of Solutions
30. What is the mass percent CH3OH of a 0.256 m CH3OH(aq) solution?
31. Calculate the molality of a 20.0% by mass ammonium sulfate (NH4)2SO4 solution. The
density of the solution is 1.117 g/mL.
32. Calculate the molality of 6.0 M H2SO4 solution. The density of the solution is 1.34 g/mL.
Chapter 12 – Physical Properties of Solutions
33. The density of a 20.3 M CH3OH (methanol) solution is 0.858 g/mL. What is the molality
of this solution? H2O is the solvent.
34. Calculate the molality of a 15.0% by mass solution of MgCl2 in H2O. The density of this
solution is 1.127 g/mL.
Chapter 12 – Physical Properties of Solutions
35. Which of the following aqueous solutions has the largest molality of benzoic acid
(C6H5COOH)?
36. Which of the following solutions has the largest molality of HCl?
37. The solubility of gases in water usually increases with
Chapter 12 – Physical Properties of Solutions
38. Which of the following gases is expected to have a higher solubility in water than what is
predicted using Henry’s law?
39. Oxygen gas makes up 21 % of the atmosphere by volume. What is the solubility of O2(g)
in water at 25C if the atmospheric pressure is 741 mmHg? The Henry’s law constant for
oxygen gas at 25C is 1.3 10–3 mol/L·atm.