* Hydrolysis: When sodium bicarbonate dissolves in water, it undergoes hydrolysis. This means it reacts with water molecules to produce hydroxide ions (OH⁻), which are responsible for the alkaline nature of a solution.
* Reaction: NaHCO₃ + H₂O ⇌ H₂CO₃ + NaOH
* The reaction is in equilibrium, meaning it goes in both directions.
* The formation of NaOH (sodium hydroxide) is a strong base, leading to the release of OH⁻ ions.
* pH: A solution of sodium bicarbonate will have a pH greater than 7, indicating alkalinity. This is due to the presence of hydroxide ions (OH⁻) in the solution.
In summary:
Bicarbonate of soda exhibits alkaline properties due to the release of hydroxide ions (OH⁻) when it dissolves in water. These ions neutralize acids, which is why sodium bicarbonate is often used as an antacid or in baking to neutralize acidic ingredients.
