dissolves in excess sodium production of sodium hydroxide solution. aluminate. Solutions of copper(II), WS 2.2 iron(II) and iron(III) ions form coloured precipitates when sodium hydroxide solution is added. Copper(II) forms a blue precipitate, iron(II) a green precipitate and iron(III) a brown precipitate. 4.8.3.3 Carbonates react with dilute 1 Describe how dilute acids Use dilute acid to test for the Video clip: acids to form carbon dioxide can be used to identify following carbonates: YouTube: gas. Carbon dioxide can be carbonates to another identified with limewater. student. sodium carbonate potassium carbonate. Analyse the composition of an egg shell, testing for the presence of various ions using acids and other test tube reactions and flame tests. 4.8.3.4 Halide ions in solution 1 Describe how silver nitrate Use silver nitrate to test the Video clip: produce precipitates with can be used to identify following halides: YouTube: silver nitrate solution in the halides to another student. presence of dilute nitric acid. chloride Silver chloride is white, silver bromide bromide is cream and silver iodide. iodide is yellow. 4.8.3.5 Sulfate ions in solution WS 2.4, 2.6 2 Describe how barium Use barium chloride in the Video clip: produce a white precipitate chloride in the presence of presence of dilute with barium chloride solution dilute hydrochloric acid can hydrochloric acid to test for in the presence of dilute be used to identify sulfate sulfate ions. hydrochloric acid. ions to another student. Required practical 7: Plan an analysis programme to identify an
dissolves in excess sodium hydroxide solution. Solutions of copper(II), iron(II) and iron(III) ions form coloured precipitates when sodium hydroxide solution is added. Copper(II) forms a blue precipitate, iron(II) a green precipitate and iron(III) a brown precipitate. production of sodium aluminate. WS 2.2 4.8.3.3 Carbonates react with dilute acids to form carbon dioxide gas. Carbon dioxide can be identified with limewater. 1 Describe how dilute acids can be used to identify carbonates to another student. Use dilute acid to test for the following carbonates: sodium carbonate potassium carbonate. Analyse the composition of an egg shell, testing for the presence of various ions using acids and other test tube reactions and flame tests. Video clip: YouTube: 4.8.3.4 Halide ions in solution produce precipitates with silver nitrate solution in the presence of dilute nitric acid. Silver chloride is white, silver bromide is cream and silver iodide is yellow. 1 Describe how silver nitrate can be used to identify halides to another student. Use silver nitrate to test the following halides: chloride bromide iodide. Video clip: YouTube: 4.8.3.5 Sulfate ions in solution produce a white precipitate with barium chloride solution in the presence of dilute hydrochloric acid. WS 2.4, 2.6 2 Describe how barium chloride in the presence of dilute hydrochloric acid can be used to identify sulfate ions to another student. Plan an analysis programme to identify an Use barium chloride in the presence of dilute hydrochloric acid to test for sulfate ions. Required practical 7: Video clip:
AQA-8462-SOW-ANALYSIS.DOCX