Question

Complete the chemical equation and balance them.

$\mathrm{CuO}+\mathrm{\_\_\_\_\_\_\_\_}\to {\mathrm{CuSO}}_4+{\mathrm{H}}_2\mathrm{O}$

Answer 1

When metal oxides like copper oxide react with acid, it forms copper sulfate and water. They are called amphoteric oxides.

$\mathrm{CuO}+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{CuSO}}_4+{\mathrm{H}}_2\mathrm{O}$

• Number of atoms in LHS,

Cu = 1 atom, O = 5 atoms, H - 2 atoms, S = 1 atom

• Number of atoms in RHS,

Cu = 1 atom, O = 5 atoms, H - 2 atoms, S = 1 atom

The number of atoms in LHS and RHS is equal and the equation is said to be balanced.

Therefore, the balanced chemical equation is $\underset{\mathrm{Oxide}}{\underset{\mathrm{Copper}}{\mathrm{CuO}\left(\mathrm{s}\right)}}+\underset{\mathrm{Acid}}{\underset{\mathrm{Sulphuric}}{{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}}\to \underset{\mathrm{Sulphate}}{\underset{\mathrm{Copper}}{{\mathrm{CuSO}}_4\left(\mathrm{aq}\right)}}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$