Uploaded August 2020 | Updated September 2026, 2 weeks ago

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In this video, I will teach you how to calculate the new pH of a buffer solution after adding an acid. This skill is useful when asked to calculate the change in buffer pH after adding acid. This example will look at the effect of adding hydrochloric acid and will use the Henderson Hasselbalch equation to calculate the pH.

This worked example is relevant for both A level and AP chemistry as well as degree level.