AI(OH)_(2)darr ("white")+ OH^(-) rarr [AI(OH)_(4)]^(-) (soluble complex) White precipitate of AI(OH)_(3) reappears when:

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) White precipitate of AI(OH)_(3) reappears when:
Answer» a solution of AMMONIUM chloride is added a solution of ammonia is added concentrated `HNO_(3)` is added in excess 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.