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25 mL of an aqueous solution of KCl was ...

`25 mL` of an aqueous solution of `KCl` was found to requires `20 mL` of `1M AgNO_(3)` solution when titrated using a `K_(2)CrO_(4)` as indicator. Depression in freezing point of `KCl` solution with `100%` ionisation will be :
`(K_(f) = 2.0 mol^(-1) kg "and molarity = molality")`

A

`5.0^@`

B

`3.2^(@)`

C

`1.6^(@)`

D

`0.8^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
`25 xx M_(KCL)=20 xx 1 M_(AgNO_(3))`
`:. M_(KCL)=0.8`
`DeltaT_(f)=M'K_(f)i`
`=0.8 xx 2 xx 2`
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