Decimolar weak monoprotic acid (pK_a = 4.8) is titrated with decimolar potash solution. What is the pH at half-equilvalence point ?

Decimolar weak monoprotic acid (pK_a = 4.8) is titrated with decimolar

1.	Decimolar weak monoprotic acid (pK_a = 4.8) is titrated with decimolar potash solution. What is the pH at half-equilvalence point ?
Answer» Solution :At half the equivalence point 50% of the acid is consumed for salt FORMATION and REMAINING 50% of acid is unconsumed. This is a good buffer, (salt] = [acid] PH at half-equilvalence point = `PK_a` = 4.8