RDGburets - Reading: Burets Revised 5/2/03 BURETS A buret...

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Burets Revised 5/2/03 BURETS A buret is a piece of volumetric glassware used to deliver variable liquid amounts typically for titrations. It is a long glass cylinder open at one end and fitted at the opposite end with a stopcock valve (Figure 1). The stopcock valve controls the flow of liquid from the cylinder through the buret tip. The buret used in the General Chemistry lab has a 50-mL volume and a Teflon stopcock requiring no lubrication. The buret is etched with calibration markings at 0.10- mL intervals allowing the estimation of variable liquid levels to the hundredths of a milliliter (0.00 mL). Record all numbers from markings and one number estimated between markings (significant figures) to indicate the sensitivity of the volume measurement. 2 4 6 8 10 1 3 5 7 9 4.0 3.0 2.0 1.0 0 Stopcock controls flow Touch off hanging drop into flask or beaker Liquid level in buret is read from the TOP DOWN. The liquid level is 2.80 mL, (not 3.20 mL) The last decimal place is an estimated number. Figure 1.
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This note was uploaded on 11/20/2010 for the course CHEMISTRY Chem 1LE taught by Professor Dr.kimberlyedwards during the Spring '10 term at UC Irvine.

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RDGburets - Reading: Burets Revised 5/2/03 BURETS A buret...

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