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Equivalence point on titration curves.

August 23, 2018

Titration is a laboratory procedure where a known base is added to unknown acid (or vise versa) to figure out the molarity of the unknown. When the base completely neutralizes acid, an equivalence point has been reached.

Equivalence point pH depends on the strength of the acid and base involved in the titration. For a strong acid/ strong base titration, equivalence point pH will be 7, since all of the acid will be completely neutralized by the base.

For a strong acid/ weak base titration, at equivalence point there will be conjugate acid left, and therefore pH will be slightly acidic, below 7. 

For a strong base/ weak acid titration, at equivalence point there will be conjugate base left, and therefore pH will be slightly basic, above 7. 

 

 

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