A novel apparatus has been constructed that is both a hot plate and an analytical balance to determine how the waters of hydration are driven off from a sample of a hydrate. In this experiment, a 0.82

A novel apparatus has been constructed that is both a hot plate and an analytical balance to determine how the waters of hydration are driven off from a sample of a hydrate. In this experiment, a 0.822 g sample of copper sulfate pentahydrate is placed in an evaporating dish that weighs 44.056 g. The hot plate is turned on to a setting of 2 (140°C) and data is recorded for mass as a function of time as the water is driven off of the original sample. Each time that there is a level reading of mass for more than 2 minutes, there exists a stable compound. Identify the formula for each of the two stable compounds using the graph of the data below.