ZIMSEC O-Level Chemistry
7.4.3Water purification
Water purification in ZIMSEC O-Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Topic61 practice questions3 lessons
In this topic
Lessons
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Hard and soft water
30 min
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Water: tests, sources and pollutants
30 min
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Treatment of the water supply
25 min
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Sample question
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