MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent ConceptStrength of Solution

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

A.0.44 mol Kg–1

B.1.14 mol kg–1

C.3.28 mol kg–1

D.2.28 mol kg–1✓ Correct

Explanation

Density of given solution= 1.02 g/ml. Clearly, 1.02g/ml means 1020g/ litre. Now, mass of solvent= mass of solution- mass of solute =1020-123g=897g. Molality of the prepared solution is 123 1000 / 60 897 2.28 / mol kg x x

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