MODEL RELEASED. Chemistry experiment. Student performing an iodometric titration. A measured volume of a solution from a burette (down centre right) is dripped into a conical flask (lower right) containing a measured volume of an iodine- containing solution. Titrations make it possible to determine what volume of a solution is required to react quantitatively with another. In iodometric titrations this occurs when the iodine indicator in the conical flask becomes colourless (equivalence point).