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A solution containing 30 g of a non-vola...

A solution containing 30 g of a non-volatile solute exactly in 90 g water has a vapour pressure of 2.8 k `P_(a)` at 298 K. Further 18 g of water is then added to solution, the new vapour pressure becomes 2.9 k `P_(a)` at 298 K. Calculate.
(i) Molecular mass of the solute
(ii) Vapour pressure of water at 298 K.

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AI Generated Solution

To solve the problem step by step, we will use Raoult's Law and the information provided in the question. ### Step 1: Define Variables Let: - \( M \) = Molecular mass of the solute - \( P_0 \) = Vapor pressure of pure water at 298 K - \( P_A \) = Vapor pressure of the solution (given as 2.8 kPa for the first case and 2.9 kPa for the second case) ...
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