Original post by JacobBob
You prepare a sodium phosphate buffer by mixing 100 ml of 0.1 M Na2HPO4 with 100 ml of 0.01 M NaH2PO4. The pH of the final solution is 7.8. What is the approximate pka of the acid component of the buffer?
Change pH into [H+] and substitute into the acid dissociation equation.
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