Question

Give a balanced equation for the following conversation.

(1). Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate

Answer 1

Reaction of Calcium sulphate with Sodium carbonate:

• Calcium sulphate reacts with sodium carbonate to form calcium carbonate and sodium sulphate.
• This reaction is used for the softening of hard water.
• The balanced chemical equation can be written as:

$\underset{(\mathrm{Sodium}\mathrm{Carbonate})}{{\mathrm{Na}}_2{\mathrm{CO}}_3\left(\mathrm{aq}\right)}+\underset{(\mathrm{Calcium}\mathrm{Sulphate})}{{\mathrm{CaSO}}_4\left(\mathrm{aq}\right)}\to \underset{\underset{\left(\mathrm{Insoluble}\right)}{(\mathrm{Calcium}\mathrm{Carbonate})}}{{\mathrm{CaCO}}_3\left(\mathrm{s}\right)\downarrow }+\underset{(\mathrm{Sodium}\mathrm{sulphate})}{{\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}$