Question

Dissolving 120 g of a compound of (mol. wt. 60) in 1000 g of water gave a solution of density 1.12 g/mL. The molarity of the solution is: 

(a) 1.00 M 

(b) 2.00 M 

(c) 2.50 M 

(d) 4.00 M

Answer 1

Correct option: (b) 2.00 M

Explanation:

Given 

mass of solute (w) = 120 g 

mass of solvent (w) = 1000 g 

Mol. mass of solute = 60 g 

density of solution = 1.12 g/ mL 

From the given data, 

Mass of solution = 1000 + 120 = 1120 g