O-LevelChemistryStoichiometry5070/11 · Oct/Nov 2017 · Q121 Mark

25.0 g of hydrated copper(II) sulfate crystals are heated to produce anhydrous copper(II) sulfate and water vapour. CuSO₄.5H₂O(s) → CuSO₄(s) + 5H₂O(g) What is the mass of anhydrous copper(II) sulfate formed? [Mr: CuSO₄, 160; H₂O, 18]

A9.0 g

B16.0 g

C22.5 g

D25.0 g

✓ Correct answer

B: 16.0 g

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 1, question 12.

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