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What weight of glycerol should be added ...

What weight of glycerol should be added to 600 g of water in order to lower its freezing point by `10^@ C` ?
`(K_f=1.86^@ C m^(-1))`

A

496 g

B

297 g

C

310 g

D

426 g

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaT_(1) = (K_(f) xxW_(2) xx1000)/(M_(2)xxW_(1)) rArr W_(2) xx M_(2) xx T/(k_(2) xx 1000)`
`W_(2) = (10 xx 92 xx600)/(1.86 xx1000) = 296.77` g
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