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

The density of a solution prepared by dissolving 120g of  urea  (mol.  mass  =  60  u)  in  1000  g  of  water  is 1.15g/mL. The molarity of this solution is

A.0.50 M
B.1.78 M
C.1.02 M
D.2.05 M✓ Correct
Explanation

Given, Mass of solute= 120 g. Mass of solvent= 1000 g. Mass of solution= 1120 g. Volume= mass/density=1120/1.15 Mass of solute Moles of solute Molecular mass of solute 120 60 2 Therefore, Molarity of solution = 2 1000 1.15 2.05 1120 M x x

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