Match the column.
Column-I | Column-II |
(i) Buffer capacity is Maximum for an acid buffer is | [A] pH = pKa + log |
(ii) At the th of the equivalence point for the titration of weak acid HA | [B] (pKa + log3) |
(iii) At the th of the equivalence point for the titration of weak acid HA | [C] pH = pKa – log |
(iv) The pH of (M) solution of weak acid HA | [D] pH = pKa |
Text Solution
Verified by Experts(i) [D]; (ii) [A]; (iii) [C]; (iv) [B]
(i) [D]
(ii) [A]
(iii) [C]
(iv) [B]
Sol.
At maximum buffer capacity , [salt] = [acid] hence pH = pK a
→
At the 
the equivalence point of titration of weak acid HA, pH = pK a + log 
→
At the 
th equivalence point of titration of weak acid HA, pH = pK a + log 3 = pK a – log 
→
For C(M) solution of weak acid HA,
pH = 
(pK a – log C) = 
(pK a – log 
)
= 
(pK a + log 3)
→
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