1. What colour do iodine ions produce?
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2. What colour does aluminium, calcium and magnesium produce in hydroxide test?
3. What colour does iron III produce in hydroxide test?
4. What steps are involved in the sulphate test?
- Add sulphur dioxide, white precipitate should form
- Add sulphuric acid then barium chloride. If white precipitate forms, sulphate ions were present.
- Red precipitate forms
5. What colour do chloride ions produce?