What is the molality of 2.05 molar aqueous solution of acetic acid ? The density of solution is 1.02 gram/mL.

Options

A. 1.14 M
B. 3.28 M
C. 2.28 M
D. 0.44 M

Answer

C

Explanation

`M=2.05 M, d=1.02, M_(1)=60 g//mol`
`m =(1000 M)/(1000d-MM_(1))=(1000xx2.05)/(1000xx1.02-(2.05xx60))`
= 2.28 M.