We’re being asked to identify theoxidation state of carboninCO32– (carbonate ion).
You are watching: Determine the oxidation state of c in co3-2
The rules for oxidation says are as follows:
A. General Rules:
1. For an atom in its elepsychological create (Zn, Cl2, C(graphite), etc.) O.S. = 0
2. For an ion (Li+, Al3+, and so on.) O.S. = charge
B. Specific Rules:
1. Group 1A O.S. = +1
2. Group 2A O.S. = +2
3. Hydrogen O.S. = +1, through nonmetals
O.S. = –1 with steels and boron
4. Fluorine O.S. = –1
5. Oxygen O.S. = –1 in peroxides (X2O2, X = Group 1A)
O.S. = –1/2 in superoxides (XO2, X = Group 1A)
O.S. = –2 in various other compounds
6. Group 7A O.S. = –1 (except when bonded to O)
Because CO32– is neithera peroxide or superoxide,the oxidation state of each oxygen atom is –2.
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What is the oxidation state of the carbon atom in the carbonate ion, CO32-?
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