Question

During an experiment the students were asked to prepare a 20% (m/m) solution of sugar in water . Meena dissolved 20g of sugar in 100g of water , while rita dissolved 20g of sugar in water to make 100g of the solution .
1. Is the concentration of two solutions same.
2. Compare the mass % of the two solutions

Answer 1

(a) No. 
Mass % = Mass of solute  Mass of solute + Mass of solvent ×100
(b) Solution made by Ramesh 
Mass % = 10/ 100 +10 x 100 = 10 /110 x100 = 9.09% 
Solution made by Sarika 
Mass %  = 10 /100 ×100 = 10% 
The solution prepared by Sarika has a higher mass % than that prepared by Ramesh.

Answer 2

Answer:

(a) No. 

Mass % = Mass of solute  Mass of solute + Mass of solvent ×100

(b) Solution made by Ramesh 

Mass % = 10/ 100 +10 x 100 = 10 /110 x100 = 9.09% 

Solution made by Sarika 

Mass %  = 10 /100 ×100 = 10% 

The solution prepared by Sarika has a higher mass % than that prepared by Ramesh.