G9 Chemistry December Newsletter

This month students will learn about Air and Water

This unit builds on ideas from Units 1 and 2. The concepts of this unit will be revisited in Units 6 and 10.

This unit begins by looking at the way in which we can test for water and its treatment. Learners could compare methods of treatment in their country and the UK. The composition of the air is covered next and linked to this are the important topics of carbon dioxide production and links to the environment. The unit also includes a consideration of the rusting of iron and its prevention. In this unit students will perform water test in the lab. Students will continue learning about periodic table as well

These are the main topics we will cover for IGCSE combined science

·        Describe a chemical test for water

·        Describe and explain, in outline, the purification of the water supply by filtration and chlorination

·        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

·        Noble gases Describe the noble gases as being unreactive

·        Describe the formation of carbon dioxide

·        Explain why the proportion of carbon dioxide in the air is increasing and why this is important

·        Describe the rusting of iron in terms of a reaction involving air and water, and simple methods of

rust prevention