Q50 / 180 · NEET 2015 (Phase 2) · Chemistry

What is mole fraction of the solute in a 1.00 m aqueous solution?

A
0.177
B
1.770
C
0.0354
Correct answer
D
0.0177

Solution

1.0 m solution means 1 mole solute is present in 1000 g water.

n_{H_{2} O} = 55.5 m o l H_{2} O

X_{S o l u t e} = \frac{n_{S o l u t e}}{n_{S o l u t e} + n_{H_{2} O}} = \frac{1}{1 + 55.5} = 0.0177

Hence, the correct answer is option: 'D'.

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