Higher the amount of acid or base used to produce a definite change of pH in a buffer solution,higher will be its buffer capacity. Buffer capacity of solution is maximum under the following conditions: [Salt= [Acid] (in acid buffer), [Salt] = [Base] (in base buffer) pH of a buffer solution lies in the range given below: pH = pk_(a)pm1, In other words, any buffer solution can be used as buffer up to two pH units only, depending upon the value of pK_(a), or pK_(b),. A buffer is said to be efficient when pH_(a) =pK_(a), or pOH= pk_(b) The bulfer capacity is equal to :

Higher the amount of acid or base used to produce a definite change of

1.	Higher the amount of acid or base used to produce a definite change of pH in a buffer solution,higher will be its buffer capacity. Buffer capacity of solution is maximum under the following conditions: [Salt= [Acid] (in acid buffer), [Salt] = [Base] (in base buffer) pH of a buffer solution lies in the range given below: pH = pk_(a)pm1, In other words, any buffer solution can be used as buffer up to two pH units only, depending upon the value of pK_(a), or pK_(b),. A buffer is said to be efficient when pH_(a) =pK_(a), or pOH= pk_(b) The bulfer capacity is equal to :
Answer» ONE mole of `NH_4 CL` is added to one mole of `NH_4 OH` one mole of `NH_4 OH ` is added to one mole of HCl one mole of `NH_4 Cl ` is added to one mole of NaOH one mole of `NaCl ` is added to one mole of NaOH Solution :` [B] =[S] `