In: Chemistry
if you want to prepare a buffer at pH = 5.2 which buffer would you choose?
a) MES --> Ka = 7.9 x 10^-7
b) CHES --> Ka = 5.0 x 10^-7
c) Tris --> Ka = 6.3 x 10^-9
d) acetic aid --> Ka = 1.8 x 10^-5
Thus the pKa of acetic acid is very close to the pH of given buffer hence we use d) acetic acid --> Ka = 1.8 x 10^-5