What is meant by term buffer solution?
A buffer solution to be more precise is an aqueous solution consisting of a mixture of a weak acid and its conjugate base , or vice versa.
Its pH changes very little when a small amount of strong acid or base is added to it.
Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications . In nature, there are many systems that use buffering for pH regulation.
For example, the bicarbonate buffering system is used to regulate the pH of blood .