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Question

(B) The relative lowering of vapour pressure is a colligative property,which depends on the van't Hoff factor $(i)$ and concentration $(C)$: $\Delta P

Vedclass · Accepted Answer

$1 : 1 : 1.5$

Vedclass · Answer

(B) The relative lowering of vapour pressure is a colligative property,which depends on the van't Hoff factor $(i)$ and concentration $(C)$: $\Delta P \propto i 	imes C$. For $0.1 \ M$ solutions,the concentration $C$ is the same for all. For $NaCl$,$i = 2$ $(NaCl ightarrow Na^+ + Cl^-)$. For $CuSO_4$,$i = 2$ $(CuSO_4 ightarrow Cu^{2+} + SO_4^{2-})$. For $K_2SO_4$,$i = 3$ $(K_2SO_4 ightarrow 2K^+ + SO_4^{2-})$. Therefore,the ratio is $2 : 2 : 3$,which simplifies to $1 : 1 : 1.5$.

The relative lowering of vapour pressure for $0.1 \ M$ aqueous solutions of $NaCl$,$CuSO_4$,and $K_2SO_4$ is in the ratio of...

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