Question

When Sodium sulphate and Barium Chloride are mixed in an aqueous solution, a white precipitate of _________ is formed.

Answer 1

Double displacement reaction:

• Double displacement reactions generally take place in aqueous solutions in which the ions precipitate and there is an exchange of ions.
• On mixing a solution of Barium chloride with Sodium sulphate, a white precipitate of Barium sulphate is immediately formed.
• These reactions are ionic in nature.
• When Sodium sulphate solution is added to Barium chloride, a white precipitate is formed and this settles down bottom in the form of insoluble solids.

Reaction involved

$\underset{\mathrm{sodium}\mathrm{sulphate}}{{\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}+\underset{\mathrm{barium}\mathrm{chloride}}{{\mathrm{BaCl}}_2\left(\mathrm{aq}\right)}=\underset{\mathrm{Sodium}\mathrm{chloride}}{\mathrm{NaCl}\left(\mathrm{aq}\right)}+\underset{\mathbf{}\mathbf{Barium}\mathbf{}\mathbf{sulphate}}{{\mathrm{BaSO}}_4\left(\mathrm{s}\right)}$

Thus, when is Sodium sulphate and Barium Chloride are mixed in an aqueous solution, a white precipitate of Barium sulphate is formed.