Consider a Buffer Solution Made Up of H₂PO₄^- and HPO₄^2-

question 39

Multiple Choice

Consider a buffer solution made up of H₂PO₄^- and HPO₄^2- For H₂PO₄^-, K_a = 6.2 × 10^-8. What mole ratio of HPO₄^2- to H₂PO₄^- will give a pH of 7.35?

• A) 0.14 to 1
• B) 0.72 to 1
• C) 1 to 1
• D) 1.4 to 1
• E) More information is needed to answer this question.

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