Question

A solution contains 60 g of common salt in 200 g of water.Calculate the concentration in terms of mass by mass percentage of the solution.

Answer 1

Hello,

(a) Concentration of solution 

                                   

Mass of common salt is 60g .

Mass of water is 240g .

               Mass of solution = 60 + 240 = 300g 

Concentration of solution =  

(b) (i) Centrifugation : Two components having difference in densities can be separated by centrifugation. When the mixture is rotated fast, the lighter particles come to the top and the heavier remain at the bottom.

(ii) Chromatography : This method is used to separate a mixture of different dyes. It is
based on the difference in solubilities of different solutes in the same solvent.

(iii)Distillation : Two miscible liquids can be separated by simple distillation. It is based on the difference in boiling points of the liquid components of the mixture.

Thank You,
Aayush

Answer 2

Mass of solute (salt) =60g. Mass of solvent (water)=200g. Mass of solution =mass of solute + mass of solvent = 60 +200=260g. Mass by mass % of a solution=. :-. Mass of solute/mass of solution*100=60/260*100=23.0%