Question

Write the chemical equation for the reaction of calcium hydroxide with carbon dioxide.

Answer 1

• Carbon dioxide, when subjected to reaction with limewater i.e. calcium hydroxide [Ca(OH)2] results in the formation of a white precipitate of calcium carbonate (CaCO3) having a milky appearance, and water is also produced here.
• The chemical equation for this reaction is given below;

$\underset{\mathbf{Calcium}\mathbf{}\mathbf{hydroxide}}{\mathbf{Ca}{\mathbf{\left(}\mathbf{OH}\mathbf{\right)}}_{\mathbf{2}}\mathbf{\left(}\mathbf{aq}\mathbf{\right)}\mathbf{}}\mathbf{+}\underset{\mathbf{Carbon}\mathbf{}\mathbf{dioxide}}{\mathbf{}{\mathbf{CO}}_{\mathbf{2}}\mathbf{\left(}\mathbf{g}\mathbf{\right)}}\mathbf{}\mathbf{\to }\underset{\underset{\mathbf{(}\mathbf{milky}\mathbf{}\mathbf{solution}\mathbf{)}}{\mathbf{Calcium}\mathbf{}\mathbf{carbonate}}}{\mathbf{}{\mathbf{CaCO}}_{\mathbf{3}}\mathbf{\left(}\mathbf{s}\mathbf{\right)}\mathbf{\downarrow }}\mathbf{+}\mathbf{}\underset{\mathbf{water}}{{\mathbf{H}}_{\mathbf{2}}\mathbf{O}}\mathbf{\left(}\mathbf{l}\mathbf{\right)}$