Question

When comparing the titration curves for the titration of a strong acid with a strong base and the titration of a weak acid with a strong base, which portion of the curves will be the most similar?

Answer 1

When comparing the titration curves for the titration of a strong acid with a strong base and the titration of a weak acid with a strong base, pH increases when we reach the equivalent point.

In strong acid and strong base

Initially the pH rises little by little. This is because the scale of the pH increases is logarithmic. Then it rises sharply near the equivalent point. At this point the remaining hydronium ions are low, and only a small amount of hydroxide ion is needed to raise the pH.

For weak acid and strong base

Weak acid has low pH but second point is firstly the pH rises faster but less quickly when approaching the equivalent point.

The pH produced by titration of weak acid with strong base rises faster at first but less quickly when approaching the equivalent point.

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