Solutions

Topics in this chapter

• Solution Concentration Terms
• Ideal and Non-Ideal Solutions
• Henry’s Law and Gas Solubility
• Boiling and Freezing Point Effects
• Osmotic Pressure and Isotonicity
• Van’t Hoff Factor and Dissociation

Cheat sheet

Practice questions

1. Question 1Q-0FE6E5

   Which of the following concentration terms is independent of temperature?

   1. A.Molarity
   2. B.Molality
   3. C.Normality
   4. D.Formality
   See the answer and solution
2. Question 2Q-306E74

   An aqueous solution of glucose is marked as 10% w/w. The density of the solution is $1.2 \text{ g/mL}$. The molarity of the solution is approximately:

   1. A.0.55 M
   2. B.0.67 M
   3. C.0.45 M
   4. D.0.78 M
   See the answer and solution
3. Question 3Q-8DA233

   According to Henry's law, the solubility of a gas in a liquid is directly proportional to:

   1. A.Volume of the liquid
   2. B.Partial pressure of the gas above the liquid
   3. C.Total pressure of the system
   4. D.Temperature of the system
   See the answer and solution
4. Question 4Q-CB7D6C

   Which of the following liquid pairs exhibits a positive deviation from Raoult's law?

   1. A.Acetone and Chloroform
   2. B.Benzene and Toluene
   3. C.Ethanol and Acetone
   4. D.Chloroform and Benzene
   See the answer and solution
5. Question 5Q-65BC48

   The vapor pressure of pure benzene at a certain temperature is $0.850 \text{ bar}$. A non-volatile, non-electrolyte solid weighing $0.5 \text{ g}$ is added to $39.0 \text{ g}$ of benzene (molar mass $78 \text{ g/mol}$). The vapor pressure of the solution is $0.845 \text{ bar}$. What is the molar mass of the solid substance?

   1. A.58 \text{ g/mol}
   2. B.170 \text{ g/mol}
   3. C.34 \text{ g/mol}
   4. D.68 \text{ g/mol}
   See the answer and solution