Conclusion:

In this experiment we determined the mass, moles, and percent of SO4 in a precipitate. Determining the percent of SO4 in the precipitate allowed us to figure out the identity of the unknown sample. By completing the Table 5 with the possible unknowns, I was able to identity the unknown substance. Two observations lead me to my determination. First, the substance had to be soluble in water, which was observed during the lab when we were dealing with the sample. This constraint eliminates some of the choices while leaving the rest as water-soluble substances. The second thing to do was to calculate the formula weight of the unknown as well as the possibilities in Table 5. The SO4 content that was closest to the experimental percentage was the unknown substance. After analyzing the percentages of SO4 I was able to conclude that the unknown substance was Lithium (Li2).