First slide

Theory of dilute solutions

Question

The lowering of vapour pressure due to a solute in a 1 m aqueous solution at 100 $°$ C is

Moderate

Solution

$\frac{∆ P}{P °} = \frac{m o l a l i t y x_{} M_{2}}{1000} ∆ P = \frac{1 \times 18}{1000} \times 760 = 13.68 (a t 100 ° C, P^{0} = 760 t o r r)$

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