Question

Flocculation value for As₂S₃ sol by HCl is 30 m mole L^–1 . Calcualte mass of H₂SO₄ required in gram for 250 mL sol.

Answer 1

The answer is (0.36)

For 1L sol 30 m mol of HCl is required

∴ For 1L sol 15 m mol H₂SO₄ is required

For 250 mL of so

15/4 x 10^-3 m mol H₂SO₄ ≡ 0.3675 g