Question

Calculate the normality and molarity of H₂SO₄ solution containing 4.9 g of H₂SO₄ per litre of the solution.

Answer 1

Given: Mass of H₂SO₄​​ = 4.9 g

Volume of solution = 1 L

Molar mass of H₂SO₄​​ = 98 g/mol

H₂SO₄​ is a diprotic acid (provides 2 H⁺ ions).

Molarity (M) = `"Given mass (g)"/("Molar mass" xx "Volume (L)")`

M = `4.9/(98 xx 1)`

M = `4.9/98`

M = 0.05 mol/L

Normality (N) = Molarity × Basicity (no. of H⁺ ions)

N = 0.05 × 2

Normality (N) = 0.1 N