Given the Following K_a Values, Which Anion Is the Strongest

question 74

Multiple Choice

Given the following K_a values, which anion is the strongest base $\begin{array}{|l|l|}\hline \text { Acid } & \mathrm{K}_{3} \\\hline \mathrm{H}_{2} \mathrm{CO}_{3} & 4.2 \times 10^{-7} \\\hline \mathrm{HCO}_{3}^{-} & 4.8 \times 10^{-11} \\\hline \mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4} & 6.5 \times 10^{-2} \\\hline \mathrm{HC}_{2} \mathrm{O}_{4}^{-} & 6.1 \times 10^{-5} \\\hline \mathrm{H}_{2} \mathrm{PO}_{4}^{-} & 6.2 \times 10^{-8} \\\hline\end{array}$

• A) HCO₃^-
• B) CO₃^2-
• C) HC₂O₄^-
• D) C₂O₄^2-
• E) HPO₄^2-

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