Question

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

$\mathrm{CaO}+{\mathrm{H}}_2\mathrm{O}\to$

Answer 1

Reaction of Calcium oxide with water:

• When Calcium oxide(quick lime) reacts with water it forms Calcium hydroxide(slaked lime) with the evolution of heat.
• Since the heat evolved during the reaction. So, it is an exothermic reaction.
• The balanced chemical reaction can be written as:

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

• It is an example of a combination reaction because in this reaction two reactants combine to form a new compound as the product.