Revise
http://www.bbc.co.uk/bitesize/standard/chemistry/revision_videos/solubility/video/
http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/chemical/detergentsrev3.shtml
http://www.bbc.co.uk/education/guides/zrr2pv4/revision
http://www.bbc.co.uk/education/clips/z2hd2hv
Test yourself:
http://www.bbc.co.uk/education/guides/zrr2pv4/test
http://www.sciencequiz.net/jcscience/jcchemistry/water_solutions/water_solutions_mcq.htm_