Buret Calibration.
Calibrating a buret is similar to the procedure for a pipet.
Except that several volumes will be delivered.
The internal bore of the buret is not perfectly cylindrical, and it will be a bi “wavy,” so the actual volume delivered will vary both plus and minus from the nominal volumes marked on the buret , as increased volumes are delivered.
You will ascertain the volume at 20% full-volume increments (e.g.,each 10 mL., for a 50-mL buret) by filling the buret each time and then delivering the nominal volume into a dry flask.
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a buret is used for the accurate delivery of a variable amount of solution. its principal use is in titrations, where a standard solution is added to the simple solution until the end point ( the detection of the completion of the reaction ) is reached. The conventional buret for macrotitrations is marked in 0.1-mL increments from 0 to 50 mL; one is illustrated in Figure 2.13. The volume delivered can be read to the nearest 0.01 mL by interpolation ( good to about +0.02 or +0.03 mL ).