Chemistry · Oct / Nov 2022 · Paper 11 · Question 16

When excess aqueous barium chloride is added to 25.0 cm³ of 1.00 mol/dm³ sodium sulfate, a white precipitate of barium sulfate is formed. Na₂SO₄(aq) + BaCl₂(aq) → BaSO₄(s) + 2NaCl(aq) The precipitate is filtered off, washed, dried and weighed. 5.36 g barium sulfate is obtained. What is the percentage yield of barium sulfate? [Mᵣ: Na₂SO₄, 142; BaCl₂, 208; BaSO₄, 233; NaCl, 58.5]

1. A2.3%
2. B27%
3. C92%
4. D97%

As printed in the paper