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Calibration of Glassware - Lab Report Example

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These tools are extensively used in analysis in the laboratory. Calibration was carried out by getting the mass of required apparatus and liquid…
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Calibration of Glassware
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Download file to see previous pages Get rid of all the water in the canonical flask. All the other volumes of water marks in canonical flask will be measured by the balances that read to ±0.0001 g for this experiment. The only exception will be the calibration of 100 mL volumetric flask mark. For that mark, one should use the balances that read to ±0.001 g because they can handle heavier weights. The estimated uncertainties are weight of water, error in sighting the level of the water, density of water and error in temperature reading. So as to avoid introducing random and systematic errors in measurements, it is essential to calibrate them.
Volumetric glassware is manufactured to specific standards, but it is not all identical and the manufacturing tolerances are not as strict as you may require for certain Lab measurements. Indeed, small variations often occur from one piece of glassware to the next. It is possible to correct for systematic errors in the calibration markings, and such corrections are necessary for the most accurate analytical work.
Volumetric measurements are affected by two main systematic errors; parallax and temperature. The volume that a certain liquid occupies varies with temperature. Even the volume of the apparatus holding the liquid is also affected by the temperature. 21 degrees Celsius has been taken as normal room temperature for calibration.
This table contains as many as 50 trials in order to get more reliable estimation of the measurement uncertainties. The data value was arrived at by conducting a minimum of three trials to obtain a suitable calibration. All the findings were recorded in the format above.
To improve on proper measurement of volumes, manual calibration of apparatus should be done regularly. To also improve on their performance, volumetric flasks, which are usually colorless, they might be amber-colored so as to handle most light-sensitive ...Download file to see next pagesRead More
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