Given the PK_a Values for Phosphoric Acid of 2

question 21

Multiple Choice

Given the pK_a values for phosphoric acid of 2.14, 6.86 and 12.4, what is the ratio of HPO₄^2-/H₂PO₄^- in a typical muscle cell where the pH is 7.2?

• A)0.46
• B)2.2
• C)6.3 * 10^-6
• D)1.1 * 10⁵
• E)none of the above

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