[Olympiad] What is the coordination number and oxidation state of Cobalt in the complex [Co(NH₃)₅Cl]Cl₂?
- 6 and +2
- 6 and +3
- 5 and +3
- 6 and +1
📝 Detailed explanation
Coordination number is the number of ligands attached to the central metal (5 NH₃ + 1 Cl = 6).Charge balance: x + 5(0) + 1(-1) + 2(-1) = 0 => x - 3 = 0 => x = +3.