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If sodium sulphate is considered to be completely dissociated into cations and anions in equeous solution, the change in freezing point of water ( f T? ), When 0.01 mol of sodium sulphate is dissolved in 1 kg of water, is ( 1 f Kgmol 86K1.K - = )

If sodium sulphate is considered to be completely dissociated into cations and anions in equeous solution,
the change in freezing point of water ( f T? ), When 0.01 mol of sodium sulphate is dissolved in 1 kg of
water, is ( 1 f Kgmol 86K1.K - = )

Grade:12

1 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
9 years ago
molality of sodium sulfate=mole of sodium sulfate/weightof solvent(kg)=.01/1
vant hoff factor=3=i as number of particle formed after dissociation is 2Na+ +So4^2-
depression in freezing point=iKfm
where m is the molality
=3*1.86*.01=.0558k

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