ZIMSEC O-Level Chemistry
Quality of water from different sources
Quality of water from different sources in ZIMSEC O-Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic42 practice questions2 lessons
Overview
Form 3 (competency matrix 8.16.1, headed 'Composition of water from different sources'): dams, boreholes, rivers and rain; hard and soft water.
Learning objectives
What the syllabus expects you to be able to do.
- 7.4.3.1Describe the composition of water from different sources, such as dams, boreholes, rivers and rain, comparing colour, smell and pH.
- 7.4.3.2Distinguish between hard and soft water.
- 7.4.3.3Describe the effects of hard water on boilers, electric kettles, geysers and water pipes and on the lathering of soap.
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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Sample question
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