MCQ
The mole fraction of the solute in one molal aqueous solution is
- A$0.027$
- B$0.036$
- ✓$0.018$
- D$0.009$
✓
Answer
Correct option: C.
$0.018$
c
(c) $W = 1000\,gm$ $({H_2}O)$; $n = 1\,mole$
(c) $W = 1000\,gm$ $({H_2}O)$; $n = 1\,mole$
$N = \frac{W}{M} = \frac{{1000}}{{18}} = 55.55$
${x_{{\rm{Solute}}}}\,=\,\frac{n}{{n + N}} = \frac{1}{{1 + 55.55}}$ $= 0.018.$
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