Question

(a) Calculate the pH of a 0.15M acetate buffer (a solution containing 0.1 mol/L acetic acid and 0.1 mol/L sodium acetate), given that the pKa of acetic acid is 4.7.
(b) What would be the pH value after adding 0.05 mmol of sodium to 1l of 0.2 mol/L acetate buffer?

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