HCHO2(aq) + H2O(l) <-> H3O+(aq) + CHO2-(aq) HCHO2(aq), a weak acid (Ka = 2 x 10^-4), dissociates in — Acids and Bases Chemistry Question
Question
HCHO2(aq) + H2O(l) <-> H3O+(aq) + CHO2-(aq)
HCHO2(aq), a weak acid (Ka = 2 x 10^-4), dissociates in water according to the equation above. Which of the following provides the best estimate of the pH of 0.5 M HCHO2(aq) and identifies the species at the highest concentration (excluding H2O) in the solution?
A.
pH = 1, and the species at highest concentration is H3O+(aq)
B.
pH = 1, and the species at highest concentration is HCHO2(aq)
C.
pH = 2, and the species at highest concentration is H3O+(aq)
D.✓ Correct
pH = 2, and the species at highest concentration is HCHO2(aq)
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