Question

Write the reaction that occurs between Calcium oxide and water.

Answer 1

Reaction between Calcium oxide (CaO) and water (H₂O)

• Calcium metal reacts with water to form a solution of Calcium Hydroxide $\left[{\mathrm{Ca}\left(\mathrm{OH}\right)}_2\right]$ .
• Calcium Hydroxide is also called slaked lime.

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