Neutralisation is a chemical reaction in which an acid reacts with a base to form salt and water. In this process, a hydrogen ion of the acid combines with a hydroxide ion of the base to form a water molecule. The anion of the acid combines with the cation of the base to form a salt.
Household cleaners contain ammonium hydroxide, which is a weak base. An acid or base is considered b or weak depending on the concentration of hydrogen and hydroxide ions within it. This concentration or the power of hydrogen differs from substance to substance and can be measured using a scale, called the pH scale. A neutral solution is indicated by a pH value of 7 on the scale. A solution that has a pH value of less than 7 is acidic and a solution with a pH value of more than 7 is basic.
Antacids like Milk of Magnesia are mild bases that neutralise the acids in the stomach and aid digestion. If the pH lowers, the acidity in the mouth increases and leads to tooth decay. Toothpastes are basic in nature and they counteract the acid in the mouth.
Hydrangea produces pink flowers when the soil has a pH value of 6.8 or higher and blue flowers when the pH value is 6.0 or less.
If the soil is acidic, then the applied pesticides, herbicides, and fungicides will not be absorbed by the soil. In order to neutralise the soil, suitable bases are used. Generally, salts of calcium or magnesium, which are basic, are used to neutralise soil acidity.
When a bee stings, formic acid is released. That is what makes the skin burn. Baking soda, which is a base, neutralises the formic acid and provides relief from the pain