Several opaque bottles in a stockroom have lost their labels. Two of the bottles contain pure samples whose formulas are known to be CuSO₄·5H₂O and Cu₂O, respectively.
A laboratory technician must restore the proper labels so that future users are aware of the exact substances and the oxidation state of copper present in each.
Respond completely to each task below.
(1) Determine the oxidation state of the copper ion in CuSO₄·5H₂O. Show your reasoning.
(2) Write the full systematic name of CuSO₄·5H₂O, including the appropriate hydrate notation.
(3) Determine the oxidation state of the copper ion in Cu₂O. Show your reasoning.
(4) Write the full systematic name of Cu₂O. Then, compare the names of the two copper compounds you have provided and explain how the nomenclature communicates the differing oxidation states of copper in the two samples.