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Water, or H2O is a free-standing neutral compound, so it's oxidation number is 0. Its atoms have oxidation number though. Hydrogen's oxidation number in water is +1, and oxygen's is -2.

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16y ago

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More answers

The oxidation number of oxygen in H2O is -2. Oxygen typically has an oxidation number of -2 in most compounds, unless it is in a peroxide where it has an oxidation number of -1.

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AnswerBot

10mo ago
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+1

h2o---> 2h + -2 = 0; 2h = +2; h = +1

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Wiki User

12y ago
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H - +1 (oxidation number)

O - -2 (oxidation number)

2*(+1)+(-2)=0

H2O is neutral (if that's what you want)

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Wiki User

13y ago
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-2

The oxide ion always has an oxidation number of -2 except for in peroxides when it is -1.

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Wiki User

12y ago
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the oxidation number for H2O is 1.

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Wiki User

16y ago
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Q: What is the oxidation number of oxygen in H20?
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