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6. Iron 3+ and dilute OH

  • white ppt
  • brown gelatenous ppt
  • yellow solution
  • brown ppt

7. Aluminium 3+ and water

  • blue solution
  • white ppt
  • colourless
  • green solution

8. Copper 2+ and water

  • pale blue
  • red
  • green
  • yellow

9. Iron 2+ and dilute ammonia

  • green gelatenous ppt
  • green blue ppt
  • yellow
  • deep blue solution

10. Iron 2+ and water

  • green solution
  • orange solution
  • pale green solution
  • blue solution

11. Chromium 3+ and carbonate

  • blue ppt + bubbles
  • red
  • green ppt + bubbles
  • green ppt

12. Chromium 3+ and conc OH

  • green
  • yellow
  • blue ppt
  • blue

13. Cobolt 2+ and dilute ammonia

  • yellow
  • orange
  • blue ppt
  • green blue ppt

14. Copper 2+ and conc ammonia

  • orange
  • pale yellow
  • deep blue solution
  • green blue ppt

15. Iron 2+ and dilute OH

  • green gelatenous ppt
  • pale yellow solution
  • orange
  • blue gelatenous ppt

16. Cobolt 2+ and dilute OH

  • red ppt
  • white ppt
  • blue ppt
  • green gelatenous ppt

17. Aluminium 3+ and conc ammonia

  • blue
  • white ppt
  • green
  • colourless

18. Iron 3+ and conc ammonia

  • yellow solution
  • brown gelatenous ppt
  • blue green ppt
  • green solution

19. Iron 3+ and water

  • brown/ yellow
  • brown/ yellow/ purple
  • green/ blue
  • pink/ red

20. Iron 2+ and conc ammonia

  • orange
  • green gelatenous ppt
  • green solution
  • blue ppt