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 $ .
