Q10 of 58 Page 32

On adding dilute HCl to CuO powder, the solution formed is blue green. Predict the new compound formed which imparts a blue-green colour to the solution.

When HCl is diluted with copper oxide, the following reaction takes place:

HCl + CuO → CuCl2 + H2O


The new compound formed is copper chloride (CuCl2) which imparts a blue-green colour to the solution. The above reaction is a type of double displacement reaction.


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