1. Assign Oxidation States to Known Elements
* Chlorine (Cl): Chlorine typically has an oxidation state of -1. Since there are six chloride ions (6 Cl), the total negative charge contributed by chlorine is -6.
2. Use the Overall Charge to Determine Platinum's Oxidation State
* Overall Charge: The complex ion has a charge of -2.
* Let x be the oxidation state of Pt: x + (-6) = -2
* Solve for x: x = +4
Therefore, the oxidation state of platinum (Pt) in PtCl62- is +4.
