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Figure 2.4.7 : Proper position of the solution's meniscus relative to the volumetric flask's calibration mark. Finally, before using a pipet or volumetric flask rinse it with several small portions of the solution whose volume you are measuring. This ensures the removal of any residual liquid remaining in the pipet or volumetric flask.
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Laboratory flasks are vessels or containers that fall into the category of laboratory equipment known as glassware. In laboratory and other scientific settings, they are usually referred to simply as flasks. Flasks come in a number of shapes and a wide range of sizes, but a common distinguishing aspect in their shapes is a wider vessel "body.
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The Schlenk flask and the Straus flask are another two that look fairly similar. Schlenk flasks are commonly used in air-sensitive chemistry, as the side arm allows an inert gas such as nitrogen to be pumped into the vessel. The Straus flask, on the other hand, is used to store dried solvents. The main neck is actually filled in halfway up, and.
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Volumetric flasks, also called graduated flasks or measuring flasks, are items of laboratory glassware or plasticware calibrated and labelled to contain a specified volume of reagents, solvents, or other liquids. Volumetric flasks are often used to create chemical solutions.
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A volumetric flask ( measuring flask or graduated flask) is a piece of laboratory apparatus, a type of laboratory flask, calibrated to contain a precise volume at a certain temperature. Volumetric flasks are used for precise dilutions and preparation of standard solutions.
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Volumetric and Measuring Pipets. As the above diagram shows, a volumetric pipet has one calibration mark and is designed to deliver one fixed volume. Various capacities (i.e. 5 mL, 20 mL, 50 mL etc.) are available and are accurate to two digits after the decimal.. Fig. 5 250 mL Volumetric flask. Volumetric flasks are available with.
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How to Use a Volumetric Flask. To prepare a solution in a volumetric flask, follow these steps: Measure and add the solute for the solution. Add enough solvent to dissolve the solute. Continue to add solvent until you near the line marked on the volumetric flask. Use a pipette or dropper to fill the volumetric flask, using the meniscus of the.
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1. Preparing Standard Solutions 2. Titrations 3. Diluting Concentrated Acids/Bases Uses of Volumetric Flasks Here are the parts of a volumetric flask: The bulb holds the liquid. It has a round or pear shape. The glass surface is smooth and uniform. The neck pours out the liquid. It is long, narrow and tubular.