Question

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

$\mathrm{KBr}+{\mathrm{Cl}}_2\to$

Answer 1

• When Potassium bromide reacts with Chlorine it gives Potassium chloride and Bromine gas is evolved.
• The chemical equation can be written as:

$\underset{\mathrm{Potassium}\mathrm{bromide}}{\mathrm{KBr}\left(\mathrm{s}\right)}+\underset{\mathrm{Chlorine}}{{\mathrm{Cl}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Potassium}\mathrm{chloride}}{\mathrm{KCl}\left(\mathrm{s}\right)}+\underset{\mathrm{Bromine}}{{\mathrm{Br}}_2\left(\mathrm{g}\right)}$

• To balance the equation we multiply Potassium chloride and Potassium bromide by 2 and get the number of Potassium atoms balanced.

$\underset{\mathrm{Potassium}\mathrm{bromide}}{2\mathrm{KBr}\left(\mathrm{s}\right)}+\underset{\mathrm{Chlorine}}{{\mathrm{Cl}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Potassium}\mathrm{chloride}}{2\mathrm{KCl}\left(\mathrm{s}\right)}+\underset{\mathrm{Bromine}}{{\mathrm{Br}}_2\left(\mathrm{g}\right)}$

• It is an example of a displacement reaction.
• Displacement reaction: A displacement reaction is one wherein the atom or a set of atoms is displaced by another atom in a molecule.