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Solutions — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistrySolutions3 Marks
Question
Using Raoult’s law explain how the total vapour pressure over the solution is related to mole fraction of components in the following solutions.
$NaCl(s)$ and $H_2O(l)$
✓

Answer

For a solution containing non-volatile solute i.e. $NaCl(s)$ and $H_2O(l),$ the Raoult’s law is applicable only to vaporisable component $(1)$ i.e. $H_2O(l)$ and total vapour pressure is written as,
$\text{p}=\text{p}_1=\text{x}_1\text{p}^0_1$
Where $p_1^o$ reresents the vapour pressure of pure $H_2O(l)$

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