Solutions Question 57

Question: An aqueous solution of a weak monobasic acid containing 0.1 g in 21.7g of water freezes at 272.813 K. If the value of $ K_{f} $ for water is 1.86 K/m, what is the molecular mass of the monobasic acid [AMU 2002]

Options:

A) 50 g/mole

B) 46 g/mole

C) 55 g/mole

D) 60 g/mole

Show Answer

Answer:

Correct Answer: D

Solution:

$ m=\frac{K_{f}\times w\times 1000}{\Delta T_{f}\times W}=60,g/mole $ .



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