Section+5a

back to IGCSE chemistry = **Extraction and uses of metals** = **You will be assessed on your ability to** 5.1 explain how the methods of extraction of the metals in this section are related to their positions in the reactivity series 5.2 describe and explain the extraction of aluminium from purified aluminium oxide by electrolysis, including: i the use of molten cryolite as a solvent and to decrease the required operating temperature ii. the need to replace the positive electrodes iii. the cost of the electricity as a major factor 5.3 write ionic half-equations for the reactions at the electrodes in aluminium extraction 5.4 describe and explain the main reactions involved in the extraction of iron from iron ore (haematite), using coke, limestone and air in a blast furnace 5.5 explain the uses of aluminium and iron, in terms of their properties. = **Section notes** =

=** Reso urces **=

Text book pages

 * chapter 17 page 139

**Video**
[|Extraction of metals]

Animations
[|Extraction of aluminium] Click on the play button below: media type="file" key="Extraction of aluminium [EDocFind.com].swf" width="360" height="270" Alchemy: more on aluminium and its extraction: [|aluminium] [|Iron blast furnace] [|Blast furnace at start of industrial revolution] [|Old film about blast furnace] [|bbc bitesize iron and aluminum]