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Question
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Copper [II] sulphate to sodium hydroxide.
Solution
Copper [II] sulphate and sodium hydroxide
\[\ce{CuSO4 2NaOH -> Na2SO4 + \underset{\text{Copper [II] hydroxide}}{Cu(OH)2↓}}\]
The precipitate formed is Copper [II] hydroxide which is pale blue in colour.
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