10.1 Water
- Syllabus
- 0620–2026–2027
- Topic
- 10.1
- Level
- —
10.1.1—Chemical tests for the presence of
- Describe chemical tests for the presence of water using anhydrous cobalt(II) chloride and anhydrous copper(II) sulfate
10.1.2—To test for the purity of water using
- Describe how to test for the purity of water using melting point and boiling point
10.1.3—Distilled water is used in practical
- Explain that distilled water is used in practical chemistry rather than tap water because it contains fewer chemical impurities
10.1.4—Substances found in natural water
- State substances found in natural water: dissolved oxygen, metal compounds, plastics, sewage, harmful microbes, fertiliser nitrates, and phosphates from fertilisers/detergents
10.1.5—Some of these substances are
- State: some of these substances are beneficial, (a) dissolved oxygen for aquatic life (b) some metal compounds provide essential minerals for life
10.1.6—Harmful substances: toxic metal
- State harmful substances: toxic metal compounds, plastics harming aquatic life, sewage microbes causing disease, and nitrates/phosphates causing deoxygenation and aquatic damage. Eutrophication details not required
10.1.7—Treatment of the domestic water supply
- Describe treatment of the domestic water supply in terms of: (a) sedimentation and filtration to remove solids (b) use of carbon to remove tastes and odours (c) chlorination to kill microbes
Objective notes
7 learning objectivesConceptIGCSE Chemistry