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

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

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

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

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

How do you differentiate between energy and power ?

How do we differentiate between CO_(3)^(2-) and SO_(3)^(2-) in dilute H_(2)OSO_(4) group ? ( Note : These are sodium salts ?

Differentiate between Na_2CO_3 and NaHCO_3 .