1. Have a think! A mystery compound was analysed. In the flame test, a green result was produced. On testing with sodium hydroxide, a blue precipitate was produced. When tested with hydrochloric acid, carbon dioxide was produced. What is the metal ion and how did you know? What is the negative ion and how did you know?

2. Objectives To be able to detail chemical tests in terms of ionic equations. To review all chemical tests from C3 topic.

3. Ionic equations Summarise the ions that do the chemistry. E.g. CuCl 2 (aq) + 2NaOH(aq)  Cu(OH) 2 (s) + 2NaCl(aq) Cu 2+ (aq) + 2OH - (aq)  Cu(OH) 2 (s)

4. Metal ion + NaOH  Ca(OH) 2 (s) Cu 2+ (aq) + 2OH - (aq)  Cu(OH) 2 (s) Fe 2+ (aq) + 2OH - (aq)   Fe(OH) 3 (s) Al 3+ (aq) + 3OH - (aq)  Al(OH) 3 (s) Then Al(OH) 3 (s) + OH-  Al(OH) 4 - (aq)

5. Molecular ion tests Carbonate Sulphate Sulphite

6. Halide ion tests Chloride Ag + (aq) + Cl - (aq)  AgCl(s) Bromide Iodide

7. Plenary – 5, 4, 3, 2, 1. List five metal symbols. List four molecular ions. List three halide symbols. List two reactants used to test for sulphate. List one gas which is tested with potassium dichromate.