Volumetric flasks are precision laboratory glassware designed for preparing solutions of exact volumes. They feature a pear-shaped body, flat bottom, long narrow neck with a single etched calibration mark, and often a fitted stopper. These flasks ensure high accuracy for dilutions and standard solutions in analytical chemistry.
Volumetric flasks prepare standard solutions, perform dilutions, and standardize concentrations for titrations. Unlike graduated cylinders or beakers, their single mark minimizes measurement error. They support temporary storage but prioritize precision over mixing or heating.
Clean with appropriate solvents, avoiding abrasives to preserve calibration. Store with stoppers to prevent dust, and handle by the neck to avoid body contact. Inspect marks regularly for accuracy.
Flasks are typically made from borosilicate glass for thermal and chemical resistance or plastics like polypropylene for durability. Capacities range from 1 mL to 4 L, calibrated “to contain” (TC) at 20°C. Class A versions offer superior precision over Class B.
