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So my understanding of buffer solutions is that when a strong acid is added, it will react with the conjugate base to convert the strong acid to a weak acid. The weak acid then dissociates to reform some of the weak base, and therefore resists the change in pH.

What I do not understand; when the weak acid dissociates to reform the weak base, it will produce hydronium ions and thus the pH WILL actually decrease. How is it 'resisting' when in fact it is still producing hydronium ions?

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