Theory Worksheet: CHAPTER 2 SOLUTION

CHAPTER 2 SOLUTION 

Theory Questions:

1. Define the following terms: a. Solution b. Solute c. Solvent d. Solubility e. Concentration

2. Differentiate between the following: a. Homogeneous mixture and Heterogeneous mixture b. Saturated solution and Unsaturated solution c. Solubility and Miscibility

3. Explain the types of solutions with suitable examples: a. Solid solutions b. Liquid solutions c. Gaseous solutions

4. What are the factors affecting the solubility of a solute? Discuss each factor briefly.

5. Define the following concentration terms and give their mathematical expressions: a. Mole fraction b. Molarity c. Molality d. Mass percentage

6. State Henry's law and explain its significance.

7. Discuss the following colligative properties of solutions: a. Vapor pressure lowering b. Boiling point elevation c. Freezing point depression d. Osmotic pressure

8. Explain the process of preparing a solution. What factors can affect the solubility of a solute during the preparation?

9. Describe the concept of "like dissolves like" with suitable examples.

10. Differentiate between solubility and solubility product.

Numerical Questions:

1. Calculate the mass percentage of solute in a solution containing 25 grams of solute and 125 grams of solution.

2. What is the molarity of a solution prepared by dissolving 10 grams of NaOH in 500 mL of water?

3. Calculate the molality of a solution prepared by dissolving 25 grams of glucose in 200 grams of water.

4. A solution contains 30 grams of glucose (C6H12O6) in 500 grams of water. Calculate the mole fraction of glucose in the solution.

5. Calculate the vapor pressure of a solution containing 25 grams of ethanol (C2H5OH) and 75 grams of water. Given that the vapor pressure of pure ethanol and pure water at the same temperature is 100 mmHg and 25 mmHg, respectively.

6. Calculate the boiling point of a solution prepared by dissolving 20 grams of sodium chloride (NaCl) in 500 grams of water. The boiling point elevation constant for water is 0.52 °C/m.

7. A solution contains 5 grams of urea (NH2CONH2) in 100 grams of water. Calculate the freezing point depression of the solution. The freezing point depression constant for water is 1.86 °C/m.

8. Calculate the osmotic pressure of a solution prepared by dissolving 0.1 moles of glucose (C6H12O6) in 500 mL of water at 25°C. (R = 0.0821 L·atm/mol·K)