| (h) Chemical tests |
| 2.45 describe how to carry out a flame test |
2.46 know the colours formed in flame tests for these cations:
- Li+ is red
- Na+ is yellow
- K+ is lilac
- Ca2+ is orange-red
- Cu2+ is blue-green
|
2.47 describe tests for these cations:
- NH4+ using sodium hydroxide solution and identifying the gas evolved
- Cu2+, Fe2+ and Fe3+ using sodium hydroxide solution
|
2.48 describe tests for these anions:
- Cl–, Br– and I– using acidified silver nitrate solution
- SO42– using acidified barium chloride solution
- CO32– using hydrochloric acid and identifying the gas evolved
|
| 2.49 describe a test for the presence of water using anhydrous copper(II) sulfate |
| 2.50 describe a physical test to show whether a sample of water is pure |
