What is the oxidation number of Mn in MnO2?
Understand the Problem
The question is asking for the oxidation number of manganese (Mn) in the compound MnO2, which involves understanding how to calculate oxidation states based on the common oxidation states of oxygen and the overall charge of the compound.
Answer
+4
The final answer is +4
Answer for screen readers
The final answer is +4
More Information
The oxidation number of manganese (Mn) in MnO2 is +4 because, in the compound, each oxygen atom has an oxidation state of -2, and there are two oxygen atoms. When you sum these with Mn’s oxidation state to equal zero (neutral compound), Mn must have an oxidation state of +4.
Tips
A common mistake is forgetting that MnO2 is a neutral compound and that the sum of the oxidation numbers must be zero.
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