Write the observation and balanced equations for the following reactions : Ammonium hydroxide is added first in a small quantity and then in excess to a solution of copper sulphate.
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Solution
A pale blue ppt. develops when Ammonium hydroxide () is added drop by drop to a copper sulphate solution, which dissolves in excess of to create a deep blue or inky blue solution, i.e. Tetraamminecopper(II) sulphate.