Along which of the following parts of a pHpH titration curve for a weak monoprotic acid/strong base is the solution buffered?
Question
Along which of the following parts of a pHpH titration curve for a weak monoprotic acid/strong base is the solution buffered?
Solution
The solution is buffered along the parts of the pH titration curve where the weak monoprotic acid and its conjugate base are present in significant amounts. This typically occurs before the equivalence point, where there is still weak acid present to react with any added strong base, and after the point where half the weak acid has been neutralized by the strong base, where the concentration of the weak acid and its conjugate base are equal. This region of the curve is relatively flat, indicating that the pH of the solution is resistant to changes in the amount of strong base added.
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