Calculate the mass of potassium sulphate required to prepare its 10 percent (mass percent) solution in 100 g of water.

Explanation

Mass percent = `("Mass of solute")/("Mass of solute + Mass of water")xx 100`
`10 = (x)/((x + 100)) xx 100 or 1 = (x)/((x + 100)) xx 10`
`x + 100 = 10x or 9x = 100 or x = (100)/(9) = 9.1 g`