What is the – InterviewSolution

1.	What is the
Answer» The SOLUBILITY product of hydroxides of cations of group III is extremely low. `NH_(4)Cl` suppressess the ionisation of `NH_(4)OH` to a GREAT extent due to common ion EFFECT. As a result low concentration of `OH^(ɵ)` is made AVAILABLE for precipitating group III cation hydroxides. Solution :Why do we ADD excess of `NH_(4)Cl` and `NH_(4)OH` in the precipitation of group III cations.?

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