A buffer can be prepared from a weak acid, HA, and it's conjugate base, A⁻. A 1L solution is prepared in which the concentrations are [HA] = 0.2M and [A⁻] = 0.1 M. The pKa of HA is 7.5. What is the pH of this solution before and after 50 ml of 1M KOH, a strong base, is added?

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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.