Question

calculate the mass of sodium sulphate requried to prepare 40% solution in 400g of water?? ​

Answer 1

Answer:

Answer: 25 g

Explanation:

Let the mass of sodium sulphate required be = x g

The mass of solution would be = (x +100) g x g of solute in (x + 100) g of solution

20% = ×/x+100 x100

20 x + 2000= 100 x 80 x = 2000

x = 2000/ 80 = 25 g

4.2