In this laboratory it is possible to recognize the instruments and volumetric elements used in the chemistry laboratory. The objective of this practice is to select the instrument indicated to take samples of solutions with different volumes. The instruments available for the development of this practice are a volumetric pipette, a graduated pipette, cylinders of 100, 200 and 1000 ml, a volumetric balloon, a 250 ml flask and a 1000 ml beaker. It is necessary to recognize the type of instrument (graduated or graduated).