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If sodium sulphate is considered to be c...

If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water `(DeltaT_(f))`, when 0.01 mol of sodium sulphate is dissolved in 1 kg of water, is : `(K_(f)=1.86 K kg "mol"^(-1))`

A

`0.0372K`

B

`0.0558K`

C

`0.0744K`

D

`0.0186K`

Text Solution

Verified by Experts

The correct Answer is:
B
`Na_(2)SO_(4)(S)overset(H_(2)O)rarr2Na^(+)(aq)+SO_(4^(2-)(aq.)`
`DeltaT_(f)=i K_(f)m`
`=3xx1.86xx0.01`
`=0.0558K`.
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