Chemistry 0620 · IGCSE · Ions and ionic bonds

Ions and ionic bonds — practice question

Aqueous iron(III) sulfate and aqueous sodium hydroxide combine to form a precipitate of iron(III) hydroxide and a sodium sulfate solution. What is the balanced equation for this reaction?

  • A$\text{Fe}_2(\text{SO}_4)_3(\text{aq}) + 2\text{NaOH}(\text{aq}) \rightarrow \text{Fe(OH)}_3(\text{s}) + \text{Na}_2\text{SO}_4(\text{aq})$
  • B$\text{Fe}_2(\text{SO}_4)_3(\text{aq}) + 3\text{NaOH}(\text{aq}) \rightarrow \text{Fe(OH)}_3(\text{s}) + 3\text{Na}_2\text{SO}_4(\text{aq})$
  • C$\text{Fe}_2(\text{SO}_4)_3(\text{aq}) + 6\text{NaOH}(\text{aq}) \rightarrow 2\text{Fe(OH)}_3(\text{s}) + 3\text{Na}_2\text{SO}_4(\text{aq})$
  • D$2\text{Fe}_2(\text{SO}_4)_3(\text{aq}) + 6\text{NaOH}(\text{aq}) \rightarrow 4\text{Fe(OH)}_3(\text{s}) + 6\text{Na}_2\text{SO}_4(\text{aq})$

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