Making sodium, potassium and ammonium salts
1 mark · NormalWhich step must be repeated without indicator when preparing pure potassium sulfate crystals by titration?
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Correct option: Mixing the identified volumes of acid and alkali
Common mistakes: Confuses filtering or heating step with indicator involvement
Show mark scheme and worked solution
Marking points
A1 · 1 mark · Correctly chooses 'Mixing the identified volumes of acid and alkali'.
Worked solution
After performing the titration with indicator, the correct step is to repeat the mixing of the measured volumes of acid and alkali, but this time without the indicator, to make pure crystals.