Question

Calculate the mass of potassium sulphate required to prepare is 10% solution in 100g of water ?

Answer 1

  let the mass of potassium be X
A 10% mass solution in 100 g of water means --
X / (100 + x ) = 1 / 10  { Cross multiplication )
10X = 100 + X
10X - X = 100
9X = 100
then X = 100/9
that is 11.11 g is the mass of potassium sulphate require .