Laboratory glass volumetric flask with glass stopper, Nairobi Industrial Area

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A volumetric flask with a glass stopper is a type of laboratory glassware designed for precise liquid measurement. It features a long, narrow neck with a single calibration mark that indicates a specific volume when filled to that point. The body of the flask is pear-shaped or bulbous, allowing for easy mixing of liquids. The glass stopper ensures a tight seal, preventing contamination or evaporation of the contents.

This flask is primarily used in preparing accurate standard solutions and for dilution in quantitative chemical analysis. Its precise calibration and secure stopper make it ideal for tasks requiring accuracy in both preparation and storage of solutions.