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After adding non-volatile solute, freezi...

After adding non-volatile solute, freezing point of water decreases to `-0.186^(@)C`. Calculate `Delta T_(b)` if :
`K_(f) = 1.86 "K kg mol"^(-1) and K_(b) = 0.521 "K kg mol"^(-1)`

A

`0.521`

B

`0.0521`

C

`1.86`

D

`0.0186`

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta T_(f)=K_(f)xx m rArr 0.186=1.86xx m`
So m = 0.1, Put the value of m in `Delta T_(b)=K_(b)xx m`
`Delta T_(b)=0.521xx(0.1)=0.0521`
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