Question

$\rm{\underset{\text{Acid}}{2HCl}+\underset{\text{Base}}{CuO}\longrightarrow{}\underset{\text{Salt}}{CuCl_2}+\underset{\text{Water}}{H_2O}}$

Explanation of the equation ​

Answer 1

• When copper is heated in the air, it reacts with oxygen to form copper oxide which is black in colour.
• When copper oxide is mixed with hydrochloric acid a neutralisation reaction takes place and copper chloride(salt) and water is formed. The colour of the solution thus obtained becomes blue-green due to the formation of copper chloride. Hence, copper oxide is basic in nature. This can be predicted because copper oxide reacts with an acid to form salt and water which is similar to the naturalisation reaction between an acid and a base. Thus, it can be concluded that copper oxide is a basic oxide(basic in nature). Reaction is as follows:-

$\rm{\underset{\text{Acid}}{2HCl}+\underset{\text{Base}}{CuO}\longrightarrow{}\underset{\text{Salt}}{CuCl_2}+\underset{\text{Water}}{H_2O}}$

Additional Information:

Neutralisation reaction:-

A chemical reaction in which an acid and base react each other to form salt and water. During a neutralisation reaction, both the acidity of the acid and basicity of the base is nullified. This means that there is no excess of hydrogen or hydroxide ions present in the solution.

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Answer 2

Explanation:

This is an acid-base reaction (neutralization): CuO is a base, HCl is an acid.