Calculate the h2po4-hpo42- ration at the normal ph of blood

Question

There is a buffer system (H₂PO₄^-- HPO₄^2-) in blood that helps keep the pH at about 7.40. (Ka H₂PO₄^-=6.2 x10^-8).

A) Calculate the [H2PO4-]/[HPO42-] ration at the normal pH of blood. (Answer - 0.64)

B) What percentage of the HPO₄^2- ions are converted to H₂PO₄^- when the pH goes down to 6.80. (Answer - 54%)

C) What percentage of the H₂PO₄^- ions are converted to HPO₄^2- when the pH goes up to 7.80. (Answer - 47%)

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