Exam Tips: Water Treatment
Part of Water Treatment · GCSE GCSE Chemistry revision
This exam tips covers Exam Tips: Water Treatment within Water Treatment for GCSE Chemistry. Revise Water Treatment in Using Resources for GCSE Chemistry with 23 exam-style questions and 15 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 13 of 14 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 13 of 14
Practice
23 questions
Recall
15 flashcards
💡 Exam Tips: Water Treatment
🎯 Common Question Types:
- Order the stages of water treatment (2 marks)
- Explain the purpose of one stage (2 marks)
- Define potable water (1 mark)
- Compare distillation and reverse osmosis (3-4 marks)
- Explain why potable water is not pure water (2 marks)
📝 Key Command Words:
- State: Give a factual answer — no explanation needed
- Explain: Give the reason why — e.g. "Chlorine kills pathogens because..."
- Compare: Give both similarities AND differences between two methods
- Evaluate: Weigh up advantages and disadvantages, then give a conclusion
⚠️ Common Mistakes to Avoid:
- Saying potable water is pure water — it is not
- Saying filtration kills bacteria — it does not; chlorination does
- Confusing sedimentation and filtration — sedimentation uses gravity, filtration uses barriers
- Forgetting that distillation requires large amounts of energy (making it expensive)
Keep building this topic
Read this section alongside the surrounding pages in Water Treatment. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Water Treatment
What does the term 'potable water' mean?
Explain what happens to the sewage sludge produced during waste water treatment, and why this process is useful.
Quick Recall Flashcards
23 questions on Water Treatment — practise free
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