1. Metal sulfates are hygroscopic and will absorb water from the atmosphere. As a result, they must be kept in desiccators to keep them dry. Suppose, hypothetically, that the unknown metal sulfate was not desiccated. Would this error lead you to obtain a higher mass % of sulfate or a lower mass % of sulfate in the unknown? Explain. 2. In this experiment, an excess of the BaCl2 solution was added to the metal sulfate solution. Suppose, hypothetically, that an excess of the BaCl2 solution was not used. Would this error lead you to obtain a higher mass % of sulfate or a lower mass % of sulfate in the unknown? Explain. 3. The last step of the procedure involved vigorously heating the BaSO4 precipitate and filter paper in the crucible. Suppose, hypothetically, that tiny pieces of the filter paper still remained mixed in with the BaSO4 after heating. Would this error lead you to obtain a higher mass % of sulfate or a lower mass % of sulfate in the unknown? Explain. 4.An unknown metal sulfate is analyzed and determined to be 72.07% sulfate by mass. Assuming that the charge on the metal cation is +3, determine the identity of this metal cation.