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The freezing point of ether was lowered ...

The freezing point of ether was lowered by `0.60^(@)C`on dissolving `2.0g` of phenol in `100g` of ether. Calculate the molar mass of phenol and comment on the result. Given: `K_(f)` (ether)` = 5.12 K kg mol^(-1)`.

Text Solution

Verified by Experts

The correct Answer is:
`170.7 g mol^(-1)`
`DeltaT_(f) = (1000 K_(f)W_(2))/(M_(2)W_(1))`
`M_(2) = (1000 xx 5.12 xx 2)/(0.6 xx 100) M_(2) = 170.6 gm//mol`
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