Practice question
Question
What is the oxidation state of cobalt in [Co(en)2Cl₂]NO₃?
Explanation
In [Co(en)2Cl₂]NO₃, [Co(en)2Cl₂]+ balances NO₃−. Each en is neutral, each Cl− is −1. Thus, x + 0 + 2(−1) = +1, so x = +3.
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