To determine the correct formula for copper(II) chloride, we need to consider the oxidation state of copper and the nature of chloride ions.
1. Oxidation State of Copper:
- Copper(II) indicates that copper has an oxidation state of +2.
2. Chloride Ions:
- Chloride ions (Cl⁻) have an oxidation state of -1.
3. Combining the Ions:
- To form a neutral compound, the total positive charge must balance the total negative charge.
- In this case, a copper ion (with a +2 charge) must be balanced by two chloride ions (each with a -1 charge).
Putting this together:
- One Cu⁺⁺ ion and two Cl⁻ ions combine to form CuCl₂.
Thus, the correct formula for copper(II) chloride is:
[tex]$CuCl_2$[/tex].
