Q.
The freezing point of a solution containing 50 cm3 of ethylene glycol in 50 g of water is found to be −34oC. Assuming ideal behaviour, calculate the density of ethylene glycol (Kf for water = 1.86 K kg mol-1)
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a
1.13 g/cm3
b
2.00 g/cm3
c
1.8 g/cm3
d
2.25 g/cm3
answer is A.
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Detailed Solution
ΔTf=Kf×w×1000m×W34=1.86×w×100062×50w=56.66 gV=wd50=56.66dd=1.13 g/cm3
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