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Question

Calculate the pH of a solution formed by mixing 20.0 mL of 0.250 M formic acid, HCOOH, and 8.0 mL of 0.400 M NaOH. (Ka HCOOH = 1.8 ×10^-4) A) 3.99 B) 2.47 C) 2.17 D) 3.49 E) 3.74