We’re being asked to determine the oxidation state of carbon in CO32– (carbonate ion).
The rules for oxidation states are as follows:
A. General Rules:
1. For an atom in its elemental form (Zn, Cl2, C(graphite), etc.) O.S. = 0
2. For an ion (Li+, Al3+, etc.) O.S. = charge
B. Specific Rules:
1. Group 1A O.S. = +1
2. Group 2A O.S. = +2
3. Hydrogen O.S. = +1, with nonmetals
O.S. = –1 with metals 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 other compounds
6. Group 7A O.S. = –1 (except when bonded to O)
Since CO32– is neither a peroxide or superoxide, the oxidation state of each oxygen atom is –2.
What is the oxidation state of the carbon atom in the carbonate ion, CO 32-?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Calculate Oxidation Numbers concept. You can view video lessons to learn Calculate Oxidation Numbers. Or if you need more Calculate Oxidation Numbers practice, you can also practice Calculate Oxidation Numbers practice problems.
What is the difficulty of this problem?
Our tutors rated the difficulty ofWhat is the oxidation state of the carbon atom in the carbon...as medium difficulty.
How long does this problem take to solve?
Our expert Chemistry tutor, Dasha took 1 minute and 41 seconds to solve this problem. You can follow their steps in the video explanation above.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Snyder's class at FAU.