Question

what is buffer solution ?? anybody can tell ​

Answer 1

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A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. ... Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications.

Answer 2

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A buffer solution is a solution containing both an acid and a base. The solution is made by taking a weak acid and adding its conjugate base (which is formed by removing a proton from the same type of acid) or by combining a weak base with its conjugate acid. The use of conjugates is what gives a buffer solution its resistance to pH changes; it creates an equilibrium between the acid and the base which is difficult for other acids or bases to overcome. Even when strong acids or bases are added, the equilibrium between the weak acid/base and its conjugate reduce the impact of the addition on overall solution pH.