A solution containing $2 \mathrm{~g}$ of a non-volatile solute in $20 \mathrm{~g}$ of water boils at $373.52 \mathrm{~K}$. The molecular mass of the solute is ___________ $\mathrm{g} ~\mathrm{mol}^{-1}$. (Nearest integer)
Given, water boils at $373 \mathrm{~K}, \mathrm{~K}_{\mathrm{b}}$ for water $=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$
Answer (integer)
100
Solution
<p>$\mathrm{\Delta T_b=K_b.m}$</p>
<p>(0.52) = (0.52) (m)</p>
<p>$\mathrm{m=1=\frac{2(1000)}{(mw)(20)}}$</p>
<p>mw = 100</p>
About this question
Subject: Chemistry · Chapter: States of Matter · Topic: Gas Laws
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