An aqueous solution is $1.00$ molal in KI. Which change will cause the vapour pressure of the solution to…
An aqueous solution is $1.00$ molal in KI. Which change will cause the vapour pressure of the solution to increase?
Addition of $\mathrm{NaCl}$
Addition of $\mathrm{Na}_{2} \mathrm{SO}_{4}$
Addition of $1.00$ molal KI
Addition of water
Solution
When the aqueous solution of one molal $\mathrm{KI}$ is diluted with water, concentration decreases, therefore the vapour pressure of the resulting solution increases.
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