titration [(teye-tray-shuhn)

The process, operation, or method of determining the concentration of a substance in solution by adding to it a standard reagent of known concentration in carefully measured amounts until a reaction of definite and known proportion is completed, as shown by a color change or by electrical measurement, and then calculating the unknown concentrationIn chemstry, the determination of what materials are present in a sample by adding precise amounts of known chemicals and observing the chemical reaction.