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Question
How is the tetraamminezinc(II) hydroxide complex formed?
Short Answer
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Solution
It forms when excess ammonium hydroxide is added to a zinc hydroxide precipitate, dissolving it completely:
\[\ce{Zn(OH)2 + 4NH4OH -> \underset{tetraamminezinc(II) hydroxide}{[Zn(NH3)4](OH)2} + 4H2O}\]
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