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Q.

What weight of glycerol should be added to 600 g of water in order to lower its freezing point by 10CKf=1.86Cm1   (molecular weight of glycerol is 92 g)

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a

310 g

b

426 g

c

297 g

d

496 g

answer is B.

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Detailed Solution

ΔTf=Kf×m=Kf×W2×1000M2×W1

W2=10×92×6001.86×1000=296.77g

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