Which one of the following aqueous solutions | vedclass

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(C) The elevation in boiling point $(\Delta T_b)$ is a colligative property,which is directly proportional to the van't Hoff factor $(i)$ and the

Vedclass · Accepted Answer

$0.01 \ M \ Na_2SO_4$

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(C) The elevation in boiling point $(\Delta T_b)$ is a colligative property,which is directly proportional to the van't Hoff factor $(i)$ and the molarity $(M)$ of the solution: $\Delta T_b = i 	imes K_b 	imes M$.
For non-electrolytes like urea and glucose,$i = 1$.
For $KNO_3$,$i = 2$ $(K^{+} + NO_3^{-})$.
For $Na_2SO_4$,$i = 3$ $(2Na^{+} + SO_4^{2-})$.
Calculating the effective concentration $(i 	imes M)$:
$A: 1 	imes 0.015 = 0.015 \ M$
$B: 2 	imes 0.01 = 0.02 \ M$
$C: 3 	imes 0.01 = 0.03 \ M$
$D: 1 	imes 0.015 = 0.015 \ M$
Since $0.01 \ M \ Na_2SO_4$ has the highest effective concentration of solute particles,it will exhibit the highest boiling point.

Which one of the following aqueous solutions will exhibit the highest boiling point?

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