During this lab experiment, calibration techniques such as determining mass, volume and
tolerance values were implemented by using an analytical balance (
Wunderli et al.
Three trials per analysis were performed, following proper illustrations to
compare end results for each test. Such analysis was necessary to establish the reliability
and precision of calibration techniques as final values, representing closer values to each
other developed; were enough to support correct application of calibration through the
use of analytical balance
Flores, L et al. (2008)
Glassware is commonly calibrated using a liquid with an identified density, as well as its
analytical balance. Such technique is essential during the process to determine the mass
of liquid the glassware will hold, which in turn divide this mass by the density of the
liquid, obtaining the analogous volume of it. Temperature was also an important
parameter to measure since density is disturbed by temperature itself, becoming crucial in
order to attain the correct values during calculation.
Last but not least, volumetric glassware calibration certainly suited for items calibrated to
merely contain, but not advantageous for those items calibrated in order to deliver. For
such instances, including pipets, the precise method requires filling item with the
applicable volume of liquid, and distributing it into a weighed flask of proper size;
therefore, the mass of the dispensed liquid was computed along with its volume to
complete the experiment.
As part of the analytical balance process, mass calculations were most likely to be
influenced from possible errors due to imprecisely calibration techniques, including those
for the volume of water acquired.
Procedures and Materials: