Using A Burette. Step 1. Figure 4.9 4. 9: Step 1. A vertical stopcock means the buret is open and a horizontal stopcock means the buret is closed. A helpful tip: the direction of the stopcock follows the direction of the flow. Step 2. Figure 4.10 4. 10: Step 2. Rinse the burette and glassware with the titrant a few times to prevent contamination. A burette is a volumetric measuring glassware which is used in analytical chemistry for the accurate dispensing of a liquid, especially of one of the reagents in a titration. The burette tube carries graduated marks from which the dispensed volume of the liquid can be determined. If the burette is not completely dry by the time you use it, the remaining traces of water on the inside will make your titrant more dilute and thereby change its concentration. Consequently, if you don't rinse your burette with titrant and there really is some water remaining inside, the titrant you dispense will be more dilute than it should be. A burette is a laboratory graduated glass tube used to deliver measured volumes of liquid to another vessel. It is commonly used for titration in quantitative analysis. In analytical .

why is a burette used in titration