C11 syllabus statements
- 1. 04/01/16 C11 Air and WaterC11 Air and Water Syllabus statementsSyllabus statements
- 2. WaterWater 1. Describe a chemical test for water. 2. Describe and explain (in outline) the purification of the water supply by filtration and chlorination. 3. State some of the uses of water in industry and in the home.
- 3. AirAir 4. Describe the separation of oxygen and nitrogen from liquid air by fractional distillation. 5. Describe the composition of clean air as being a mixture of 78% nitrogen, 21% oxygen and small quantities of noble gases, water vapour and carbon dioxide.
- 4. Air & PollutionAir & Pollution 6. State the common air pollutants as carbon monoxide, sulfur dioxide and oxides of nitrogen, and describe their sources. 7. Explain the presence of oxides of nitrogen in car exhausts and their catalytic removal. 8. Explain why the proportion of carbon dioxide in the atmosphere is increasing, and why this is important.
- 5. Air & PollutionAir & Pollution 9. State the adverse effect of common air pollutants on buildings and on health. 10. Describe the formation of carbon dioxide: •as a product of complete combustion of carbon- containing substances; •as a product of respiration; •as a product of the reaction between an acid and a carbonate; •as a product of thermal decomposition
- 6. RustingRusting 12. Describe the rusting of iron in terms of a reaction involving air and water, and simple methods of rust prevention, including paint and other coatings to exclude oxygen.
- 7. Haber Process & AmmoniaHaber Process & Ammonia 11. Describe the essential conditions for the manufacture of ammonia by the Haber process including the sources of the hydrogen and nitrogen, i.e. hydrocarbons or steam and air. 13. Describe the need for nitrogen-, phosphorus- and potassium-containing fertilisers. 14. Describe the displacement of ammonia from its salts by warming with an alkali.