4. A 25.0 mL sample of 0.500 M formic acid (HCOOH) is titrated with 41.67 mL of 0.300 M NaOH. What is the pH at this point in the titration? Use the $K_a$ from number 2.
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\[ \text{Moles of HCOOH} = 0.500 \, \text{M} \times 0.0250 \, \text{L} = 0.0125 \, \text{mol} \] Show more…
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