Question 92685

What is the pH of a mixture of 5 ml of 0.1 mol/litre sodium acetate and 4 ml of 0.1 mol/litre acetic acid? (pKa of acetic acid at 25oC = 4.76). How is the pH changed on adding 1 ml of 0.1 mol/litre HCl to the above mixture? (Show your answer by means of calculation)