how do i create a buffer system with ph=6.4?
Creating a buffer system:
Desired pH = 6.4
What is the best acid to use?
What is the pKa of the acid?
I was thinking to use Si(OH)4 because it has a pH of 6.4 but I'm not sure that's right.
edit: Ok, I changed my mind to H2CO3 since its pKa is 6.37? still confused on ratios.