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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