How do we differentiate between (Fe^{3+}) and (Cr^{3+}) in g... | Chemistry | SolveeIt

Question

How do we differentiate between $Fe^{3+}$ and $Cr^{3+}$ in group III ?

By taking excess of $NH_4OH$

By increasing $NH_4^+$ ion concentration

By decreasing $OH^-$ ion concentration

Both (B) and (C)

Answer

Both (B) and (C)

Explanation

Solution

In a group III of analysis, addition of $NH_{4}Cl$ increases $NH_{4}^{+}$ ion concentration and decreases $OH^{-}$ ion concentration produced from $NH_{4}OH$ due to common ion effect

Chemistry Question on Equilibrium

Solution