We’re being asked to determine theoxidation state of carboninCO32– (carbonate ion).
You are watching: What is the oxidation state of carbon in co32−?
The rules because that oxidation claims are as follows:
A. General Rules:
1. For an atom in that elemental form (Zn, Cl2, C(graphite), etc.) O.S. = 0
2. Because that an ion (Li+, Al3+, etc.) O.S. = charge
B. Specific Rules:
1. Team 1A O.S. = +1
2. Group 2A O.S. = +2
3. Hydrogen O.S. = +1, v nonmetals
O.S. = –1 with metals and boron
4. Fluorine O.S. = –1
5. Oxygen O.S. = –1 in peroxides (X2O2, X = team 1A)
O.S. = –1/2 in superoxides (XO2, X = team 1A)
O.S. = –2 in various other compounds
6. Team 7A O.S. = –1 (except when bonded to O)
Since CO32– is neithera peroxide or superoxide,the oxidation state of each oxygen atom is –2.
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What is the oxidation state the the carbon atom in the lead carbonate ion, CO32-?
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