calculate pH of a muffler solution prepared trough the addit

calculate pH of a muffler solution prepared trough the addition of 10 ml of acetic acid 0.10 M and 20 ml of acsodic acetate 0.10 M

Solution

pH = pKa + log [sodium acetate / acetic acid]

pKa of acetic acid = 4.74

pH = pKa + log [sodium acetate / acetic acid]

pH = 4.74 + log (20 x 0.10 / 10 x 0.10 )

pH = 5.04 --------------------------> answer