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Question
Write a balanced equation for the following conversion:
\[\ce{CuSO4 ->[A]Cu(OH)2 ->[B] [Cu(NH3)4]SO4}\]
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Solution
\[\ce{\underset{Blue}{CuSO4} + 2NH4OH -> \underset{NH4OH ppt.dissolves}{\underset{Pale blue ppt. with excess}{Cu(OH)2\downarrow}} + (NH4)2SO4}\]
\[\ce{Cu(OH)2 + (NH4)2SO4 + 2NH4OH -> \underset{Tetraammine copper (II) sulphate}{\underset{deep blue solution}{[Cu(NH3)4]SO4}} + 4H2O}\]
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