Question

Find the molality of H₂SO₄ solution whose specific gravity is 1.98 g mL^-1 and 90% by volume H₂SO₄.

Answer 1

H₂SO₄ is 90% by volume.

Volume of solution = 100 mL

Wt. of H₂SO₄ = 90 g

Moles of H₂SO₄ = 90/98

and Weight of solution = 100 x 1.98 = 198 g

Weight of water = 198-90 = 108 g