An aqueous solution is \( 1.00 \) molal in KI. Which change will cause the vapour pressure of th...

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An aqueous solution is \( 1.00 \) molal in KI. Which change will cause the vapour pressure of the solution to increase ?
(a) addition of water
(b) addition of \( \mathrm{NaCl} \)
(c) addition of \( \mathrm{Na}_{2} \mathrm{SO}_{4} \)
(d) Addition of \( 1.0 \) molal KI
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