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Calculating the mass of ascorbic acid (C...

Calculating the mass of ascorbic acid `(C_(6)H_(8)O_(6))` to be dissolved in `74 g` of acetic acid to lower its melting point by `1.5^(circ)C. K_(f)` for `CH_(3)COOH` is `3.9 K kg nol^(-1)`.

Text Solution

Verified by Experts

The correct Answer is:
5
`Delta T_(f) = (K_(f) xx w xx 1000)/(m xx W)`
Given, `Delta T_(f) = 1.5 K, W = 74g, m_(C_(6)H_(8)O_(6)) = 176`
`:. 1.5 = (3.9)/(176 xx 74) rArr w ~~ 5g`
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