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6. What is the test and result for iodide ions?
- dilute acid (e.g. hydrochloric acid) --> carbon dioxide gas is given off
- dilute nitric acid +silver nitrate --> yellow precipitate
- dilute nitric acid +silver nitrate --> cream precipitate
- strong acid (e.g. sulphuric acid) --> carbon dioxide gas is given off
- hydrochloric acid + barium chloride solution --> orange precipitate
7. What is the test and result for sulphate ions?
- hydrochloric acid + barium chloride solution --> blue precipitate
- dilute acid (e.g. hydrochloric acid) --> carbon dioxide gas is given of
- hydrochloric acid + barium chloride solution --> white precipitate
- dilute acid (e.g. hydrochloric acid) --> white precipitate
- hydrochloric acid + barium chloride solution --> orange precipitate
8. What ion do you have present if a white precipitate is formed and does not dissolves when adding more sodium hydroxide to the solution?
- Calcium or Magnesium
- Aluminium
- Silver
- Zinc or Magnesium
- Calcium
9. What is the test and result for nitrate ions?
- sodium hydroxide + aluminium powder --> oxygen gas if given off
- sodium hydroxide + carbondioxide gas if given off
- sodium hydroxide + aluminium powder --> white precipitate
- sodium hydroxide + aluminium powder --> ammonia gas if given off
- silver suphate solution --> white precipitate
10. What coloured prcipitate do you get when mixing copper ions with sodium hydroxide?
- redish brown
- light blue
- black
- green - slowly turning brown
- silver
11. What coloured prcipitate do you get when mixing iron ions with sodium hydroxide?
- light blue
- redish brown
- green - slowly turning brown
- black
- silver
12. What coloured prcipitate do you get when mixing iron ions with sodium hydroxide?
- green - slowly turning brown
- silver
- redish brown
- light blue
- black
13. What do you have to do and test for and with if no precipitate is formed when mixing the solution with sodium hydroxide?
- hydrogen gas --> flame
- add aluminium powder --> ammonia gas --> litmus paper
- cool the solution --> ammonia gas --> litmus paper
- warm the solution --> ammonia gas --> litmus paper
- carbon dioxide --> lime water
14. What ion do you have present if a white precipitate is formed and dissolves when adding more sodium hydroxide to the solution?
- Calcium
- Zinc or Magnesium
- Silver
- Aluminium
- Calcium or Magnesium
15. What is the test and result for chloride ions?
- silver suphate solution --> white precipitate
- silver suphate solution --> cream precipitate
- nitric acid + silver nitrate solution --> white precipitate
- silver nitrate solution --> yellow precipitate
- sodium hydroxide + aluminium powder --> ammonia gas if given off