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Question
Distinguish between the following pair of compound using the test given within bracket.
Iron (II) Sulpate an and iron(III) using ammonium hydroxide)
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Solution
Iron (II) :
\[\ce{\underset{\text{(Light green solution)}}{FeSO4} + 2NH4OH ->\underset{\text{(Dirty green ppt.)}}{Fe(OH)2} + (NH4)2SO4}\]
Iron (III) :
\[\ce{\underset{\text{(Yellow solution)}}{FeCl3} + 3NH4OH ->\underset{\text{(Reddish brown ppt.)}}{Fe(OH)3} + NH4Cl}\]
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