Question

Write the chemical formula of Quick lime.

Answer 1

Quick lime

• The chemical formula of Quick lime is Calcium oxide $\left(\mathrm{CaO}\right)$.
• It is formed by the reaction of Calcium with oxygen.

$\underset{\mathrm{Calcium}}{2\mathrm{Ca}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Calcium}\mathrm{oxide}}{2\mathrm{CaO}\left(\mathrm{s}\right)}$

• Calcium oxide reacts with water to form a basic solution of Calcium Hydroxide $\left(\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\right)$.

$\underset{\mathrm{Calcium}\mathrm{oxide}}{\mathrm{CaO}\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\underset{\left(\mathrm{Base}\right)}{\mathrm{Calcium}\mathrm{hydroxide}}}{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\left(\mathrm{aq}\right)}$