Acid Acid Dissociation Constant, Ka H3PO4 7 x 10-3 H2PO4- 8 x 10-8 HPO42- 5 x...

Question

Question

Acid	Acid Dissociation Constant, K_a
H₃PO₄	7 x 10^-3
H₂PO₄^-	8 x 10^-8
HPO₄^2-	5 x 10^-13

On the basis of the information above, a buffer with a pH = 9 can best be made by using

A. H₃PO₄ + H₂PO₄^-

B. H₂PO₄^- + PO₄^3-

C. H₂PO₄^- + HPO₄^2-

D. HPO₄^2- + PO₄^3-

science chemistry

Answer 1

Answer #1

Answer 2

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