Question

Complete and balance the following equation and also state the type of reaction that is taking place:

$\mathrm{CuO}+\mathrm{HCl}\stackrel{}{\to }$

Answer 1

Double displacement reaction:

• It is a chemical reaction in which two compounds in their aqueous solutions react to form two new compounds by the mutual exchange of their radicals.
• In a general double decomposition, the reaction can be represented as
• $\mathrm{AB}+\mathrm{CD}\stackrel{}{\to }\mathrm{AD}+\mathrm{BC}$
• For example, when copper oxide$\left(\mathrm{CuO}\right)$ reacts with hydrochloric acid$\left(\mathrm{HCl}\right)$, they undergo mutual exchange of their radicals resulting in the formation of copper chloride$\left({\mathrm{CuCl}}_2\right)$ along with water$\left({\mathrm{H}}_2\mathrm{O}\right)$.
• $\underset{\mathrm{copper}\mathrm{oxide}}{\mathrm{CuO}\left(\mathrm{s}\right)}+\underset{\mathrm{hydrochloric}\mathrm{acid}}{2\mathrm{HCl}\left(\mathrm{aq}\right)}\stackrel{}{\to }\underset{\mathrm{copper}\mathrm{chloride}}{{\mathrm{CuCl}}_2\left(\mathrm{aq}\right)}+\underset{\mathrm{water}}{{\mathrm{H}}_2\mathrm{O}{\left(\mathrm{aq}\right)}_{}}$