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O-LevelChemistryStoichiometry5070/11 · Oct/Nov 2022 · Q161 Mark

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]

A2.3%
B27%
C92%
D97%

✓ Correct answer

C: 92%

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About this question

Topic
Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, Oct/Nov 2022 Paper 1 Variant 1, question 16.

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