Question

Dissolving 120g 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-

Answer 1

molarity= %by mass*density of solution*10/molar mass of solute

so we need to find

%by mass= 120*100/1000

=12

M=12*1.12*10/18

=12*11.2/18

=7.46