Dry Vial Experiment

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Register to read the introduction… A dry vial and its cap were weighed separately. The results were 20.2981 g and 2.0041 g respectively. The dry vial was weighed again with its cap and got 22.3020 g. It can be observed that the sum of the mass of the vial and the cap that were weighed separately earlier is almost equal to the mass when the dry vial and the cap were weighed together. In the next step, the dry vial without the cap was reweighed and got 20.2978 g. But when we rolled the vial around in our hand, the mass dropped to 20.2977 g it may be because of the moisture already transferred to the hands. After this, the vial was dried with the use of tissues and was reweighed again and here we got 20.2975 g probably because the mass of the moist present earlier in the vial were removed using the tissue. Lastly, when we held the vial in the mouth and was breathed on it several times, we got 20.2977 g, only to confirm that the measurement of the earlier ‘seemingly’ dry vial has moisture on it and isn’t completely dry at all. Perfect results were obviously …show more content…
The slightest movement or the stability of the table where it is located should really be firm for even the slightest vibrations greatly affect the result. It is then concluded that there should be only few people inside the room to avoid movements, therefore increase the probability of more accurate results. It was also observed that the analytical balance should be placed in a closed room to prevent the air hindrance. Some of the results were not accurate due to personal errors, instrument errors and other influences which were mentioned in the discussion. The objectives were still met; the experimenters have learned the proper usage of the analytical balance and were able to determine the errors that were done.
Tanuja Koppal, Ph.D. Analytical Balances.
Lab Manager.com, April 7,

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