Question

10g. of a mixture of NaCI and anhydrous Na₂SO₄ is dissolved in water. An excess of BaCl₂ soln. is added and 6.99 g. of BaSO is precipitated according to the equation : Na₂SO₄ + BaCl₂ → BaSO₄ ↓+ 2NaCl. Calculate the percentage of sodium sulphate in the original mixture. (O = 16 ; Na = 23 ; S = 32; Ba = 137)

Answer 1

Now 223 g of BaSO₄ is obtained from 142 g Na₂SO₄