Equivalence point

The equivalence point, or stoichiometric point, of a chemical reaction is the point at which chemically equivalent quantities of reactants have been mixed. For an acid-base reaction, the equivalence point is where the moles of acid and the moles of base would neutralize each other according to the chemical reaction. This does not necessarily imply a 1:1 molar ratio of acid:base, merely that the ratio is the same as the ratio in the chemical reaction. It can be found by means of an indicator, such as phenolphthalein or methyl orange.

The endpoint refers to the point at which the indicator changes color in a colorimetric titration. The endpoint is related to the equivalence point, but they will not necessarily be the same.

This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.