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Molal depression constant for a solvent ...

Molal depression constant for a solvent is 4.0 K kg `mol^(-1)`. The depression in the freezing point of the solvent for 0.5 mol `kg^(-1)` solution of KI (Assume complete dissociation of the electrolyte) is _______ .

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The correct Answer is:
4
`KI to K^(+) + I^(-)`
I = 2
`Delta T_(f) = I xx K_(f) xx m = 2 xx 4 xx 0.5 = 4k`
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