Question

Why in the manufacturing of soda, is carbon dioxide not dissolved at ordinary atmospheric pressure?

Answer 1

• According to Henry's law, the solubility of the gas dissolved in a liquid is directly proportional to the pressure on the surface of a liquid.
• The solubility of carbon dioxide in water under normal atmospheric pressure is rather low, but when the water surface is subjected to higher pressure a lot more ${\mathrm{CO}}_2$gas dissolves in it.
• Carbon dioxide is only sparingly soluble in water at ordinary atmospheric pressure. However, solubility increases with an increase in pressure. Therefore, Carbon dioxide is filled in soda water bottles under pressure.