Vapour pressure of pure water at `23^@C` is 19.8 torr . Calculate the vapour of 3m aqueous solution.

Explanation

To calculate the vapor pressure of a 3 molal aqueous solution of water at 23°C, we will use Raoult's Law. Here’s a step-by-step solution:

### Step 1: Understand Raoult's Law
Raoult's Law states that the vapor pressure of a solvent in a solution (P_s) is related to the vapor pressure of the pure solvent (P_0) and the mole fraction of the solvent in the solution.

The formula is:
\[ P_s = P_0 \cdot X_{solvent} \]
where \( X_{solvent} \) is the mole fraction of the solvent.
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