Chemistry 5070 · O Level · Preparation of salts

Preparation of salts — practice question

Ammonium sulfate is a salt that is used in fertilisers. Ammonium sulfate is made by neutralising dilute sulfuric acid with aqueous ammonia. Plan an experiment to produce pure dry crystals of ammonium sulfate. Your plan should make use of: • common laboratory apparatus • dilute sulfuric acid • aqueous ammonia • methyl orange indicator. No other chemicals should be used. Your plan should state: • the apparatus needed • the method to use. You may include a diagram to help answer the question.
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Plan an experiment to obtain pure dry crystals of ammonium sulfate by following the instructions provided.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: M1 select a burette or (volumetric) pipette

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