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)`.

Answer

`170.7 g mol^(-1)`

Explanation

`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`