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O-LevelChemistryStoichiometry5070/12 · May/June 2019 · Q131 Mark

A sample of magnesium hydroxide, Mg(OH)2, is made by adding an excess of aqueous sodium hydroxide to an aqueous solution containing 1.20 g magnesium sulfate, MgSO4. The mass of magnesium hydroxide formed is 0.26 g. What is the percentage yield of magnesium hydroxide?

A10.5%

B21.7%

C44.8%

D61.9%

✓ Correct answer

C: 44.8%

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About this question

Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2019 Paper 1 Variant 2, question 13.

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