Question

calculate the mass of sodium chloride required to prepare its 25% mass percent solution in 200 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