How to recognize solutions of iron (II) and iron (III) salts

How to recognize solutions of iron (II) and iron (III) salts  

Iron salts can be recognized by their characteristic qualitative reactions with alkalis:
FeCl3 + 3KOH = Fe (OH) 3 ↓ + 3KCl. The sediment is red-brown in color.
FeCl2 + 2KOH = Fe (OH) 2 ↓ + 2KCl. The sediment is dirty green.




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