Reaction of Metallic Oxides with Acids

The colour of the solution becomes blue-green and the copper oxide dissolves. The blue-green colour of the solution is due to the formation of copper(II) chloride in the reaction.

Acids react with metal oxides to produce a salt and water.

The general reaction between a metal oxide and an acid can be written as –
Metal oxide + Acid → Salt + Water

For example:
2 HCl + CuO ⟶ CuCl 2 + H 2 O

Now write and balance the equation for the above reaction. Since metallic oxides react with acids to give salts and water, similar to the reaction of a base with an acid, metallic oxides are said to be basic oxides.

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