Question

Sodium chloride was used as an important symbol in our freedom struggle. Mahatma Gandhi and his followers did Dandi march in order to stop the British government from increasing the price of common salt used daily by Indian people. How is baking soda prepared from common salt?

Answer 1

• The raw materials used in the process of baking soda are carbon dioxide, water, ammonia, and brine solution of sodium chloride in their concentrated form.
• Baking soda is also called sodium bicarbonate.
• The reaction involved in the formation of sodium bicarbonate is as follows:

$$\begin{gathered} {\mathrm{CO}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{NH}}_3\left(\mathrm{g}\right)+\mathrm{NaCl}\left(\mathrm{s}\right)\to {\mathrm{Na}}_2{\mathrm{CO}}_3\left(\mathrm{s}\right) \\ \mathrm{carbon}\mathrm{dioxide}\mathrm{water}\mathrm{ammonia}\mathrm{sodium}\mathrm{chloride}\mathrm{sodium}\mathrm{carbonate} \end{gathered}$$