What is the vapor pressure of a solution containing a non-volatile solute compar

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Question: What is the vapor pressure of a solution containing a non-volatile solute compared to the pure solvent?

Options:

Correct Answer: Lower than the pure solvent

Solution:

The vapor pressure of a solution containing a non-volatile solute is lower than that of the pure solvent due to the presence of solute particles.

What is the vapor pressure of a solution containing a non-volatile solute compared to the pure solvent?

What is the vapor pressure of a solution containing a non-volatile solute compared to the pure solvent?

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 evaporate easily and does not contribute to vapor pressure.
Step 3: Recognize that when a non-volatile solute is added to a solvent, it occupies space at the surface of the liquid.
Step 4: Realize that the presence of solute particles reduces the number of solvent molecules that can escape into the vapor phase.
Step 5: Conclude that because fewer solvent molecules can escape, the vapor pressure of the solution is lower than that of the pure solvent.

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