Question: If the vapor pressure of pure solvent A is 100 mmHg, and the mole fraction of A in the solution is 0.5, what is the vapor pressure of the solution according to Raoult\'s Law?

Options:

1. 50 mmHg
2. 100 mmHg
3. 150 mmHg
4. 200 mmHg

Correct Answer: 50 mmHg

Solution:

According to Raoult\'s Law, P_solution = X_A * P_A^0 = 0.5 * 100 mmHg = 50 mmHg.