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Question: Answered & Verified by Expert
Mole fraction of the solute in a 1.00 molal aqueous solution is
ChemistrySome Basic Concepts of ChemistryNEETNEET 2011 (Screening)
Options:
  • A 0.0177
  • B 0.0344
  • C 1.7700
  • D 0.1770
Solution:
2125 Upvotes Verified Answer
The correct answer is: 0.0177
1.00 molal aqueous solution $=1.0$ mole in $100 \mathrm{~g}$ water $n_{\text {solute }}=1 ; W_{\text {solvent }}=1000 \mathrm{~g}$.
$$
\begin{aligned}
& n_{\text {solvent }}=\frac{1000}{18}=55.56 \\
& X_{\text {solute }}=\frac{1}{1+55.56}=0.0177
\end{aligned}
$$

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