Some Basic Concepts Of Chemistry Question 9

Question: Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is

Options:

A) 0.44 mol kg1

B) 1.14 mol kg1

C) 3.28 mol kg1

D) 2.28 mol kg1

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Answer:

Correct Answer: D

Solution:

weight of acetic acid = 2.05×60=123 weight of solution = 1000×1.02=1020

weight of water = (1020-123)=897 g Molality = moles,of,solutekg,of,solvent

Molality = 2.05×1000897=2.285



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