By using the Henderson Hasselbalch equation,Calculate the Pka of lactic acid when the concentration of lactic acid is 0.01 molar. the PH is 4.80 and concentration of lactate is 0.87 molar

2 answers

What's the problem? This is just a plug and chug problem
pH = pKa + log(base)/(acid)
pH = 4.80
pKa = ?
base = lactate = 0.87M
acid = lactic acid = 0.01M
4.8=x +log 0.87/0.01
4.8=x +log 87
4.8=x + 1.94
4.8-1.94=x
x=2.86
pKa= 2.86