C11+-+Syllabus+Checklist

**C11. Air and water**

 * ======Serial No====== || ====== **Assessment Statement.**  ======

//All candidates should be able to://
|| ======Covered in Class====== || ======Revised @ home====== || ======I am certain====== || ======I need help====== ||
 * ====== 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.====== ||   ||   ||   ||   ||
 * ====== 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.====== ||   ||   ||   ||   ||
 * ====== 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.====== ||   ||   ||   ||   ||
 * ====== 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 the reaction between an acid and a carbonate.
||  ||   ||   ||   ||
 * ====== 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.====== ||   ||   ||   ||   ||
 * ====== 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.====== ||   ||   ||   ||   ||
 * ====== 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.====== ||   ||   ||   ||   ||