Question

Calculate the mass of sodium sulphate required to prepare its 20%(mass percent) solution in 100 g of water.​

Answer 1

Answer:

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