On adding ammonium hydroxide solution to Al_2 | vedclass

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Question

(A) When ammonium hydroxide $(NH_4OH)$ is added to an aqueous solution of aluminum sulfate $(Al_2(SO_4)_3)$,a white gelatinous precipitate of aluminum

Vedclass · Accepted Answer

$A$ precipitate is formed which does not dissolve in excess of ammonium hydroxide.

Vedclass · Answer

(A) When ammonium hydroxide $(NH_4OH)$ is added to an aqueous solution of aluminum sulfate $(Al_2(SO_4)_3)$,a white gelatinous precipitate of aluminum hydroxide $(Al(OH)_3)$ is formed.The reaction is: $Al^{3+} (aq) + 3NH_4OH (aq) \rightarrow Al(OH)_3 (s) + 3NH_4^+ (aq)$.This precipitate of $Al(OH)_3$ is insoluble in excess of ammonium hydroxide $(NH_4OH)$.

On adding ammonium hydroxide solution to $Al_2(SO_4)_3$ (aq) :

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