If 25.00 mL of 0.2500 M formic acid is titrated with 25.00 mL of 0.2500 M NaOH,what is the pH at the equivalence point? The K_a for formic acid is 1.8 × 10−⁴.

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Quizplus · Accepted Answer

At the equivalence point, formic acid is converted to its conjugate base, formate ion. The pH is determined by the hydrolysis of the formate ion, which makes the solution slightly basic. Using the Kb of the formate ion, the pH is calculated to be approximately 8.42.

If 2500 ML of 0