CCEA A2 CHEMISTRY [NEW]

A2 Chemistry – transition metal complexes (Office 2007) (version 1 – 2013-05-01)

CCEA AS CHEMISTRY

AS Chemistry – cation identification guide (Office 2003) (updated 2011 05 15)

AS Chemistry – cation identification guide (Office 2007) (updated 2011 05 15)

By the way, I did say I might do another powerpoint for anions. But seeing as there are so few to learn, here they are.

To test for aqueous sulfate ions, acidify the solution with hydrochloric acid then add a solution of barium ions. A white precipitate is a positive test.

To test for aqueous carbonate or hydrogencarbonate ions add hydrochloric acid and bubble the gas produced through limewater. A milky precipitate is a positive test for carbon dioxide.

To distinguish between aqueous carbonate and hydrogencarbonate ions, add a solution of magnesium ions. The formation of a white precipitate is a positive test for carbonate ions. If no precipitate is seen initially but appears when the solution is boiled, this is a positive test for hydrogencarbonate ions.

To test for aqueous halide ions, acidify the solution with nitric acid then add silver nitrate solution. Everybody knows what colours the precipitates are!!!

AS Chemistry – Trends in Group II Compounds (Office 2003)

AS Chemistry – Trends in Group II Compounds (Office 2007)

CCEA AS BIOLOGY

AS Biology - Adverse human impacts on biodiversity - Flame diagram

AS Biology – Adverse human impacts on biodiversity – “Flame diagram”

Advertisements