The solution which consumes [H^(+)] or [OH^(-)] or both simultaneously from externally added base in order to give negligible change in pH, is known as buffer solution. In general, the solution resists the change in pH. Buffer solution does not mean that there does not occur a pH change in pH. Buffer solution des not mean that there does not occur a pH change at all. It implies the pH change occurs but in neglibible amount. There are two types of buffer (i) Acidic buffer: it is a mixture of weak acid and its salt acid strong base. (ii) Basicbuffer : It is a mixture ofweak base and its salt with strong acid. To prepare a buffer of pH 8.26, amount of (NH_(4))_(2)OH solution [pK_(a)(NH_(4^(+)) = 9.26]

The solution which consumes [H^(+)] or [OH^(-)] or both simultaneously

1.	The solution which consumes [H^(+)] or [OH^(-)] or both simultaneously from externally added base in order to give negligible change in pH, is known as buffer solution. In general, the solution resists the change in pH. Buffer solution does not mean that there does not occur a pH change in pH. Buffer solution des not mean that there does not occur a pH change at all. It implies the pH change occurs but in neglibible amount. There are two types of buffer (i) Acidic buffer: it is a mixture of weak acid and its salt acid strong base. (ii) Basicbuffer : It is a mixture ofweak base and its salt with strong acid. To prepare a buffer of pH 8.26, amount of (NH_(4))_(2)OH solution [pK_(a)(NH_(4^(+)) = 9.26]
Answer» `0.05`MOL `0.025` mol `0.01` mol `0.005` mol Solution :`5.74 = 4.74 + "log" (x)/(5 xx 10^(-3))`, CALCULATING `x = 0.02`, hence `[(NH_(4))_(2)SO_(4)]` required `= 0.01`