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Acids, Bases & Salts

End Point

The point in a titration at which the indicator changes colour, signalling that the reaction is judged complete.

Unit mL

In depth

The end point is an experimental observation and differs slightly from the true equivalence point, the gap being the titration error. Choosing an indicator whose colour change falls within the steep part of the curve keeps this error negligible.

Examples in the real world

Phenolphthalein turning faint pink as the first excess drop of alkali is added.