Lab#7: Empirical Formula of a Hydrate-Laurie Chan 11/13/2008
Conclusion and Evaluation:
Aspect 1 Based on the interpreted data of group “A”, the empirical formula of aluminum chloride did not stay the same. The expected empirical formula was. In group “A” the empirical formulas are as followed...
So, as a group, we all had a different outcome of the empirical formula but the percent composition of water is the same for all. 11.2% for hydrogen and 88.8% for oxygen as shown in table #7.3.
A random error would be the measurement of the hydrate crystal. A scoopula was used to measure 3g. Also another one would be the electronic balance having an uncertainty of ±0.001g. A systematic error would be heating the evaporating dish through a wire mesh instead of a clay triangle.