Diapositive PPT
Ka = [A-] [H3O+] / [ AH ]
pH = pKa + log { [A-] / [AH] }
E.N : [H3O+] + [Na+] = [OH-] + [A-]
[H3O+] + Cb = [OH-] + [A-]
[A-] ? Cb
C.M. 1 : [AH] + [A-] = Ca + Cb
[AH] + Cb ? Ca + Cb
[AH] ? Ca
pH = pKa + log { Cb / Ca }
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