How do we differentiate between Fe^(3+)and Cr^(3+)in group III ?

1.	How do we differentiate between Fe^(3+)and Cr^(3+)in group III ?
Answer» By taking excess of `NH_4 OH` By INCREASING `NH_4^(+) `ion CONCENTRATION By decreasing `OH^(-) ` ion concentration Both b and C Solution :By controlling ionic product such that one ppts while the other doesn.t

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