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Uric acid dissociates as shown in the figure at the right with a pKa of 5.80, and can be treated as a simple monoprotic acid in this pH range. Its solubility in urine depends on the relative amount of protonated and unprotonated forms. A urine sample was found to have a pH of 5.57.

A urine sample has a ph of 5.57

What would be the ratio of the unprotonated form, A%u2013, to the protonated form, HA, for uric acid in this urine sample? [A-]/[HA]

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