AI(OH)_(2)darr ("white")+ OH^(-) rarr [AI(OH)_(4)]^(-) (soluble complex) Identify the correctstatement with respect to the gelantinous white precipitate of aluminium hydroxide.

AI(OH)_(2)darr ("white")+ OH^(-) rarr [AI(OH)_(4)]^(-) (soluble comple

1.	AI(OH)_(2)darr ("white")+ OH^(-) rarr [AI(OH)_(4)]^(-) (soluble complex) Identify the correctstatement with respect to the gelantinous white precipitate of aluminium hydroxide.
Answer» Fresh precipitate dissolves by the addition of strong acid and base Precipitate develops red lake with alizarin reagent White precipitate is slightly soluble in excess of ammonia solution All of the above Solution :`NH_(4)^(+)AI(OH)_(4)^(-) rarr NH_(4)OH + AI(OH)_(3)darr` (Alizarin red S) `rarr` Red PPT. or lake in AMMONICAL solution.