when 20g of napthoic acid(C11H8O2)is dissolved in 50g of benzene(Kf=1.72K kg/mol), a freezing point depression of 2K is observed.what is the van't Hoff factor (i)

Asked by Muneet Kaur Arora | 20th Jul, 2010, 08:48: PM

Expert Answer:

M = (11x12) + 8 + (2 x 16) = 132 + 8 + 32 = 172
mass = 20 g
ΔTb = i. Kb . m
2 = (i x 1.72 x 20 x 1000) / (172 x 50)
i = 0.5

Answered by  | 22nd Jul, 2010, 10:22: AM

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