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A burette (also spelled as buret) [1] is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. It is a long, graduated glass tube, with a stopcock at its lower end and a tapered capillary tube at the stopcock's outlet.
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A burette. Date: 14 August 2007: Source: Made in Inkscape based on Image:Burette.png. Author: Mysid (original by Quantockgoblin) Licensing. Public domain Public ...
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Then use a propipetter, a pipette bulb, or rubber bulb, to draw the liquid into the pipette. The effective way to control the volume of the solution is to use one's forefinger. [ 2 ] After getting the desired volume, the solution can be released into another vessel by lifting the finger.
By means of a rubber tubing arrangement, the gas to be analyzed is drawn into the burette and flushed through several times. Using the stopcocks to isolate the absorption pipettes 100ml is typically withdrawn into the main burette for ease of calculation and the leveling flask is raised until the water is level between it and the burette.
The slanted sides and narrow neck of this flask allow the contents of the flask to be mixed by swirling, without risk of spillage, making them suitable for titrations by placing it under the buret and adding solvent and the indicator in the Erlenmeyer flask. [7] Such features similarly make the flask suitable for boiling liquids.