What is the oxidation number of cobalt in [Co(NH₃)₆]Cl₃ A) +1 B) +2 C) +3 D) +4 E) None of the above

Question

Quizplus · Accepted Answer

To find the oxidation number of cobalt, we need to assign oxidation numbers to the other elements in the compound first:
- Chlorine has an oxidation number of -1 in this ionic compound.
- Nitrogen and sulfur are neutral (oxidation number of 0) in their elemental forms.
- Oxygen has an oxidation number of -2 in this compound.
We can set up an equation using these numbers:
(-1) + (0) + (2x) + (-2 x 18) + (-1 x 13) = 0
Solving for x gives us an oxidation number of +3 for cobalt.

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What Is the Oxidation Number of Cobalt in [Co(NH₃)₆]Cl₃