Question

How many litres of CO₂ at STP will be formed when 100 ml of 0.1 M H₂SO₄ reacts with excess of Na₂CO₃?

(a) 22.4 

(b) 2.24

(c) 0.224

(d) 5.6

Answer 1

Correct option is (c) 0.224

Na₂CO₃ + H₂SO₄ = Na₂SO₄ + CO₂ + H₂O

Moles of CO₂ formed Moles of H₂SO₄ = 0.1 x 100 x 10^-3 = 0.01 

Volume of CO₂ (STP) = 22.4 x 0.01 = 0.224 L