c) A student titrated 50.0 mL of a 0.10 M solution of a certain weak acid with NaOH. The results are given in the graph above. I) What is the approximate pKa of the acid? II) What specific value from the graph is needed, in addition to the information in part c above, to calculate the molar concentration of the NaOH? III) Identify a pH value between 2.5 and 7.5 at which the concentration of the weak acid being titrated is less than the concentration of the conjugate base.

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.