What happens to the vapor pressure of a solution as the concentration of a non-v

₹0.0

Question: What happens to the vapor pressure of a solution as the concentration of a non-volatile solute increases?

Options:

Correct Answer: It decreases.

Solution:

As the concentration of a non-volatile solute increases, the vapor pressure of the solution decreases according to Raoult\'s Law.

What happens to the vapor pressure of a solution as the concentration of a non-volatile solute increases?

What happens to the vapor pressure of a solution as the concentration of a non-volatile solute increases?

Step 1: Understand what vapor pressure is. Vapor pressure is the pressure exerted by the vapor of a liquid when it is in equilibrium with its liquid phase.
Step 2: Know what a non-volatile solute is. A non-volatile solute is a substance that does not easily evaporate and has little to no vapor pressure of its own.
Step 3: Recognize that when a non-volatile solute is added to a solvent, it occupies space at the surface of the liquid, reducing the number of solvent molecules that can escape into the vapor phase.
Step 4: Realize that as you increase the concentration of the non-volatile solute, more solvent molecules are blocked from escaping, leading to a decrease in vapor pressure.
Step 5: Apply Raoult's Law, which states that the vapor pressure of a solution is directly proportional to the mole fraction of the solvent. As the concentration of the solute increases, the mole fraction of the solvent decreases, resulting in lower vapor pressure.

Raoult's Law – Raoult's Law states that the vapor pressure of a solvent in a solution is directly proportional to the mole fraction of the solvent, and as a non-volatile solute is added, the mole fraction of the solvent decreases, leading to a decrease in vapor pressure.