The term 'CONCENTRATION' to a British chemist is often referred to as 'titre'. Titre is a French word meaning 'measurement of the strength of a solution'. In chemistry, titration is a process used to determine the CONCENTRATION of a solute in a solution. It involves adding a known volume of a reagent to a solution until the reaction reaches an endpoint. This endpoint is determined by a color change or a pH change. The CONCENTRATION of the solute can then be calculated from the volume of the reagent added.