Question

Calculate the mass of sodium sulphate required to prepare its 20% (mass percent) solution .

Answer 1

Explanation:

Let the mass of sodium sulphate required be =xg

The mass of solution =(x+100)g

x g of solute in (x + 100) g of solution

20% =

x+100

x

×100

20x+2000=100x

80x=2000

x=

80

2000

=25 g