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6. Iron 3+ and dilute OH
- white ppt
- brown ppt
- brown gelatenous ppt
- yellow solution
7. Cobolt 2+ and dilute ammonia
- yellow
- blue ppt
- green blue ppt
- orange
8. Iron 2+ and water
- pale green solution
- orange solution
- blue solution
- green solution
9. Aluminium 3+ and dilute OH
- white ppt
- colourless
- yellow
- green ppt
10. Cobolt 2+ and conc ammonia
- green gelatenous ppt
- pale yellow / brown solution
- brown solution yellow ppt
- blue solution green ppt
11. Copper 2+ and dilute OH
- pale blue ppt
- green
- blue gelatenous ppt
- orange
12. Iron 3+ and dilute ammonia
- brown gelatenous ppt
- yellow solution
- blue solution
- red solution
13. Aluminium 3+ and conc ammonia
- green
- white ppt
- colourless
- blue
14. Chromium 3+ and conc OH
- yellow
- green
- blue
- blue ppt
15. Chromium 3+ and conc ammonia
16. Copper 2+ and conc ammonia
- deep blue solution
- pale yellow
- green blue ppt
- orange
17. Iron 2+ and Carbonate
- blue solution + fizzing
- green ppt
- blue ppt
- green solution + fizzing
18. Aluminium 3+ and conc OH
- yellow solution
- green solution
- colourless
- white ppt
19. Iron 3+ and water
- brown/ yellow/ purple
- pink/ red
- green/ blue
- brown/ yellow
20. Iron 2+ and conc ammonia
- orange
- blue ppt
- green gelatenous ppt
- green solution