Which of the following acids (listed with K_a values)and their conjugate base would form a buffer with a pH of 2.34? A) C₆H₅COOH, K_a = 6.5 × 10^-⁵ B) HN₃, K_a = 2.5 × 10^-⁵ C) HClO, K_a = 2.9 × 10^-⁸ D) HF, K_a = 3.5 × 10^-⁴ E) HClO₂, K_a = 1.1 × 10^-2

Question

Quizplus · Accepted Answer

To form a buffer with a pH of 2.34, we need an acid with a pKa close to 2.34. The conjugate base of this acid should also be able to act as a buffer at this pH. Looking at the given options, only Option E has a pKa value close to 2.34 (pKa = 1.12) and can form a buffer with its conjugate base HClO2 (pKa = 2.0). Therefore, the best choice is E.

Which of the Following Acids (Listed with Ka Values)and Their

Which of the Following Acids (Listed with K_a Values)and Their