Lab 6: Mole-Mass Relationship Lab
The purpose of this experiment was to teach students the concept of stoichiometry. Stoichiometry is the process of using the chemical equation to calculate the relative masses of reactants and products involved in a reaction. This gives students an idea of what they should expect from reactions.
Data:
If you take a look at problem 4 you will see that the percentage is above 100. This unusual phenomenon can be attributed to the changed shape of the evaporation dishes. We had to change to glass beakers because the aluminum in the evaporation dish was reacting with the acid. The beaker was more narrow than the evaporating dish so the water condensed on the side and added mass because it did not fully evaporate.
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