Calculate the Ratio of the Molarities of HPO₄^2- and H₂PO₄^-

question 238

Multiple Choice

Calculate the ratio of the molarities of HPO₄^2- and H₂PO₄^- ions required to achieve buffering at pH = 7.00 .For H₃PO₄,PK_a1 = 2.12,PK_a2 = 7.21,And pK_a3 = 12.68.

• A) 0.81
• B) 1.23
• C) 0.62
• D) 0.21
• E) 1.62

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