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The mass of ascorbic acid `(C_(6)H_(8)O_(6))` to be dissolved in 100g of acetic acid to lower its freezing point by `1.5^(@)C` in g is : (`K_(f)` for acetic acid is `"4.0 K kg mol"^(-1)`)
A. 17.6
B. 8.8
C. 6.6
D. 13.2

1 Answer

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Best answer
Correct Answer - C
`DeltaT=k_(f)xx(w_(f)xx1000)/(m_(B)xxw_(A))`
`1.5=4xx(w_(B)xx1000)/(176xx100)`
`w_(B)=6.6g`]

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