40. 0.5 molal aqueous solution of a weak acid HX is 20% ionised. If kf for water is 1.86 Kkg/mol, the lowering in freezing point of the solution is A 0.56 k B 1.12 k C -0.56 k D -1.12 k

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0.5 molal aqueous solution of a weak acid $H X$ is 20% ionized. If $K_{f}$ for water is 1.86 $K k g m o l^{- 1}$ , the lowering in freezing point of the solution is

0.5

molal aqueous solution of a weak acid (HX) is

20 %

ionised. If

K_{f}

for water is

1.86 {K kg mol}^{- 1}

, the lowering in freezing point of the solution is

A 0.2 molal aqueous solution of a weak acid (HX) is 20% ionised. The freezing point of this solution is (Given for water)

Q. A

0.1

molal aqueous solution of a week acid is

30

% ionised. If

K_{f}

for water is

{1.86}^{\circ} C / m

, the freezing point of the solution will be:

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