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Q.

Buffer capacity of an acidic buffer solution is maximum when

a) pH = pKa                               (b) [salt] = [acid]

c) pKa = 7                          d) [H+] = pKa

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a

all are correct

b

b,c, d are correct

c

a and b are correct

d

c and b are correct

answer is C.

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Detailed Solution

Buffer capacity of an acidic buffer is maximum when the concentration of salt and acid are equal.

{P^H} = {P^{{K_a}}} + log frac{{left[ {salt} right]}}{{left[ {acid} right]}}= {P^{{K_a}}}

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