We’re being asked to give the chemical formula of copper(II) sulfate pentahydrate.
The rules for naming polyatomic ionic compounds are as follows:
1. The metal keeps its name and is named and written first.
– For transition metals, we use Roman numerals to denote its charge.
2. Name the polyatomic ion as you would normally.
3. Hydrates → H2O, the prefix will determine the coefficient. Separated by a dot form the main molecule.
Write the formula for copper(II) sulfate pentahydrate.
a. Cu2SO3•H5
b. (CuSO4)5
c. CuS•5H2O
d. Cu2S•H2O
e. CuSO4•5H2O
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