1. How do you test for chloride ions?
- Add silver nitrate, if a precipitate forms it contains chloride ions.
- Bubble it through limewater - if a blue precipitate is formed it contains chloride ions.
- Dip a nichrome wire in acid and dip it in the substance, put it in a bunsen burner and the flame will turn blue if chloride ions are present.
- Add water sterilising tablets. If it turns cloudy, chloride ions were present, as chlorine is present in a swimming pool.
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Other questions in this quiz
2. What group are alkali metals in?
3. Why are metals able to conduct electricity?
- Because the delocalised electrons can move when a voltage is applied
- Because they're soluble in water
- Because the protons are able to move
- Because the neutrons are delocalised and can move when a voltage is applied
4. How do you test for sulfate ions?
- Placing the sulfate ion solution in an oxygen tank. It will freeze is sulfate ions are present.
- Adding sulfuric acid and barium chloride solution. A displacement reaction will occur to show sulfate ions are present.
- Adding HCl and barium chloride solution. If a white precipitate forms it contains sulfate ions. The precipitate will be barium sulfate.
- Adding phosphate ions and silver nitrate. The metal will run off and fizz, producing a hydrogen. This shows sulfate ions are present.
5. Colour of halide ions
- Pale yellow
- Pale blue