By measuring out two grams of our unknown, and heating it up until the difference of the mass of the test tube and the anhydrous residue subtracted to 0.002g, we were able to calculate the percent water in the two possible unknowns, and then our unknown, to figure out which unknown we were given. Since our percent water was 44.9%, we concluded that our unknown is Zinc Sulfate. A possible error as to why our calculated percent water was not exact to the theoretical percent water was most likely because we did not measure exactly two grams of the unknown. Our percent error was 2.5 % due to the mass that we measured in the beginning of this experiment. Finding unknowns is very crucial to chemistry because if there is a problem, for example, of
