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Reaction of Acids and Bases with Metals

On adding dil...

Question

On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green. Write the new compound formed.

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Solution

When dilute hydrochloric acid to copper oxide powder, blue green colour is imparted due to the formation of copper chloride $C u C l_{2}$ .
The reaction is :
$2 H C l + C u O \to C u C l_{2} + H_{2} O$

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