A student was asked to identify a sample of unknown hydrate. The student was provided with the following experimental data. [3.51 g sample of the hydrate when heated loses water completely and the mass of the residue was found to be 2.22 g.]
The student was provided with two reference compounds from which the student needs to identify the unknown: Cu(NO3)2. 3H2O and Cu(NO3)2. 6H2O. Answer the following.
A). Calculate percent water of hydration in the sample. (show your calculations)
B). Identify the formula of the hydrate.