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03/01/2022 1:26 pm
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On adding ammonium hydroxide solution to Al2(SO4)3 (aq)
(a) A precipitate is formed which does not dissolve in excess of ammonium hydroxide
(b) A precipitate is formed which dissolves in excess of ammonia solution
(c) No precipitate is formed
(d) None of these
1 Answer
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03/01/2022 1:35 pm
Correct answer: (a) A precipitate is formed which does not dissolve in excess of ammonium hydroxide
Explanation:
Al2(SO4)3 + 6NH4OH → 2Al(OH)3 + 3(NH4)2SO4
Al(OH)3 + NaOH → Na+[Al(OH)4]-
It is insoluble in NH4OH.