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Nernst Equation

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Question

A solution of 10 gram of non volatile binary electrode molecular weight 100 in 500 grams of water freezes at minus 0.74 degree Celsius what is the degree of dissociation:

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Solution

$Δ T = 1000 \times K_{f} \times w / m \times 500$
$0.74 = 1000 \times 1.86 \times 20 / m \times 500$
on solving
m = 100
Actual molar mass = 100
Hencce degree of dissociation = 0%

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