The PKₐs of Phosphoric Acid Are 2

question 21

Multiple Choice

The pKₐs of phosphoric acid are 2.1,7.2,and 12.Which of the following ionic form(s) of phosphoric acid is/are present at pH 7.0?

• A)HPO₄^-2
• B)H₂PO_4-
• C)HPO₄^-2 and PO₄^-3
• D)H₂PO_4- and HPO₄^-2

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