Question

define buffers and menrion the criteria for selection of buffer system​

Answer 1

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A buffer system is a solution that resists change in pH when acids or bases are added to it. Buffer systems are made of either a weak acid and its salt or a weak base and its salt. ... Buffering capacity is the amount of acid or base that can be added to the buffer before it can no longer resist a significant change in pH.

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Answer 2

Most simply defined, a buffer is com- posed of a weak acid and its conjugate base. A buffer is an aqueous solution containing partly neutralized weak acids or bases that shows little change in pH when small amounts of strong acids or bases are added.