1. Use a scientific calculator to determine the [H+]eq from the pH values for each solution.
2. Use the obtained value for [H+]eq and the equation: HC2H3O2(aq) ⎯⎯→ H+(aq) + C2H3O2–(aq)
to determine [C2H3O2–]eq and [HC2H3O2]eq.
3. Substitute these calculated concentrations into the Ka expression you wrote in Step 1 of the Pre-Lab.
4. Compare your results with those of other students. What effect does initial HC2H3O2 concentration seem to have on Ka?
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