Making soluble salts (except sodium, potassium and ammonium salts)
2 marks · NormalGive two safety precautions you would take when preparing hydrated iron(II) sulfate crystals using dilute sulfuric acid and iron(II) oxide.
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Also accept: Wear eye protection, avoid skin contact, use tongs or heatproof gloves, handle acids carefully
Common mistakes: Suggests unnecessary safety measures; Only gives one precaution
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Marking points
B1 · 1 mark · Mentions eye protection
B2 · 1 mark · States a second relevant precaution (e.g., avoid skin contact, careful handling, use of gloves, or heating gently)
Worked solution
Wear eye protection to protect from acid splashes and heat the mixture gently to avoid spitting.