0
Acetic acid (from vinegar) is stronger, though mono-basic. pKa = 4.77
Carbonic acid (H2CO3) is di-basic. pKa,1 = 6.36 and pKa,2 = 10.25
pKa=40
how do you calculate pKa
pKa=2.86
pKa= pH - log(A/HA)
to clarify -log is subtract log
E.g A buffer is prepared by adding .15 M of NaOH and .1 of a weak acid, HA. If the pH of the buffer is 8.15, what is the pKa of the acid?
pH= 8.15 - log .15/.1
= 7.97