Question

calculate the mass of potassium sulphate required to prepare its 10g present (mass percentage) solution in 100g of water

Answer 1

If your question is:
Calculate the mass of potassium sulphate required to prepare its 10% (mass percentage) solution in 100g of water.

Then answer is here:
w/w% = (weight of solute / weight of solution) * 100

Weight of solute = (w/w%) * weight of solution / 100
= 10 * 100 / 100
= 10 g

Mass of potassium sulfate required is 10g.

Answer 2

Answer: 11.11grams

Explanation:by using formula mass of solute/mass of solution into 100

let solute be x

10%s = x/x +10 X 100

10% X 100= x/x+10

10 X ( x + 10) = x

10x + 100 = x

10x - x = 100

9x = 100

x = 100/9

x = 11.1