3. Phosphoric acid is tribasic, with pKa's of 2.14, 6.86, and 12.4. The ionic form that predominates at pH 6.86 is: A) НЗРОД. B) H2PO4 С) НРО,2- D) PO43- E) Two forms are present in equal amounts
3. Phosphoric acid is tribasic, with pKa's of 2.14, 6.86, and 12.4. The ionic form that predominates at pH 6.86 is: A) НЗРОД. B) H2PO4 С) НРО,2- D) PO43- E) Two forms are present in equal amounts
Chapter15: Complex Acid/base Systems
Section: Chapter Questions
Problem 15.34QAP
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Transcribed Image Text:3. Phosphoric acid is tribasic, with pka's of 2.14, 6.86, and 12.4. The ionic form that predominates at
рH 6.86 is:
А) НЗРОД.
В) Н2РО4
С) НРО,2-
D) PO43-
E) Two forms are present in equal amounts
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