Question

Rahul prepared a solution of copper sulphate by dissolving 20 g of copper sulphate in

180 g of water whereas Sneha prepared the same solution using 30 g of copper sulphate

in 270 g of water. Calculate the concentration in terms of mass by mass percentage of the

solution in both the cases.​

Answer 1

Answer:

Rahul's case....

mass of solute + mass of solvent= 20g + 180g = 200g

total mass of the solution = 200g

now mass percentage of solution

=(mass of solute/ mass of solution) x 100

=(20/200) x 100

=10%

Sneha's case....

mass of solute + mass of solvent= 30g + 270g = 300g

total mass of the solution = 300g

now mass percentage of solution

=(mass of solute/ mass of solution) x 100

=(30/300) x 100

=10%

Hope this would help u