Lead storage battery contains 38% by weight solution of H₂SO₄. The van’t Hoff factor is 2.67 at this concentration. The temperature in Kelvin at which the solution in the battery will freeze is ______(Nearest integer). Given K_f = 1.8 K kg mol^-1

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answer is 243.

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Detailed Solution

100g solution containing = 38 g
$\begin{array}{l} {ΔT}_{f} = {iK}_{f} m \\ {ΔT}_{f} = 2.67 \times 1.8 \times \frac{38}{98} \times \frac{1000}{62} \\ {ΔT}_{f} = 30.05 T_{f} = 242.95 \end{array}$

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