For a weak acid with a pKa = 6.5, the effective buffering range is usually considered to be pH 5.5 to pH 7.5. pH 6 to pH 7. Dependent on the molarity of the acid. pH 6.4 to pH 6.6.
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The buffering range of a weak acid is typically considered to be within one pH unit of its pKa value. This is because within this range, the acid and its conjugate base are present in significant amounts, allowing the system to resist changes in pH. So, for a Show more…
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