A buffer solution contains 0.1 mole of sodium acetate in 1000 ~cm ³ of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is equal to

Step-by-step solution

Initially [ CH ₃ COONa ]=0.1 ~mol [ CH ₂ COOH ]=0.1 ~mol when 0.1 ~mol CH ₃ COONa is added. aligned [ CH ₃ COONa ] &=0.1+0.1=0.2 ~mol pH &= pK _ a + [salt ] [acid] &= pK _ a + 0.2 0.1 &= pK _ a + 2 aligned