There was percent error in the densities when using the different glassware because of
the variation of the temperature in the room as well as the difference in the precision and
accuracy of the three different types of glassware used. The volume measurements varied so
much because each of the different glassware’s had different amounts of significant figures and
some were more precise and accurate than others. For example, the 50 mL buret had the most
significant figures because the miniscule increments allowed for the most precise
measurements with minimal approximation compared the the other two pieces of lab glassware.
In order to improve the results of the experiment the same electronic balance should have
been used over the course of the entire experiment. Another possible way to improve the results
would have been to dry the glassware between weighing to ensure that the masses were more
accurate. If asked to measure 38 mL of water the 50 mL buret would be the best measuring
device because it has the lowest average percent error and is therefore the most precise.
Additionally, if asked to measure 38.5 mL of water the answer would be the same because the 50
mL buret is still the most accurate and precise measuring device out of the three.
The goals of this lab were fully met. The lab group familiarized themselves with the
concepts of accuracy and precision, as well as learned to use correct significant figures when
dealing with the lab glassware. Also, the lab group was introduced to many properties while
using the different pieces of lab glassware, including density, which was found to be the mass of