Titration is a method of chemical analysis. It's used to determine the exact amount of a reactant in a flask by determining the exact endpoint of a reaction.
A titration is conducted in a buret filled with titrant solution. An initial volume reading is taken and the expected endpoint volume is calculated. The solution being analyzed is placed in an Erlenmeyer flask or beaker. Titrant is then added to the test solution until the expected endpoint is nearly reached. When the endpoint has been reached, the final volume in the buret is recorded and the initial volume is subtracted to determine the amount of titrant delivered.