Precipitation reactions of some aqueous metal ions with ammonia solution

Precipitation reactions of some aqueous metal ions with ammonia solution
High School Chemistry
AQA A Level Chemistry
Precipitation reactions of some aqueous metal ions with ammonia solution
Aqueous ammonia solution (2M and conc. ammonia were used) was added to aqueous solutions of Fe2+, Cu2+, Fe3+ and Al3+
All concentrations approximate:
iron (II) sulfate, 0.1M
copper (II) sulfate, 0.1M
iron (III) chloride, 0.1M
aluminium sulfate, 0.1M
aqueous ammonia, 2M
conc. ammonia was used to dissolve the copper (II) hydroxide ppt.
I think the iron (II) sulfate had undergone some oxidation to iron (III) by reacting with oxygen from the air.
VID 20180510 134855