O-LevelChemistryStoichiometry5070/11 · Oct/Nov 2022 · Q281 Mark
Sodium sulfate, Na2SO4, and sodium hydrogensulfate, NaHSO4, can both be prepared using aqueous sodium hydroxide and sulfuric acid. 2NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2H2O(l) NaOH(aq) + H2SO4(aq) → NaHSO4(aq) + H2O(l) 50 cm³ of 1 mol/dm³ sodium hydroxide is used each time. Which row shows the correct volumes of 1 mol/dm³ sulfuric acid required to prepare a sample of sodium sulfate and a sample of sodium hydrogensulfate?
A25 50
B25 12.5
C50 12.5
D50 25
✓ Correct answer
A: 25 50
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