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The titration reaction 

In the case of titration, the experimenter seeks a reaction between two chemicals: the titrand (R, Ctitrant) whose concentration is known, and the analyte whose concentration is unknown (T, Ctitré).

The titration reaction can be written this way:

ν1T + ν2R
titration products
A titration reaction must be total (or quantitative), fast and unique. Its final reaction rate τf must therefore be equal to 1 (or close to 1 : ≈ 0.95 - 1).
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