Ch.4 - Chemical Quantities & Aqueous ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: What is the oxidation state of the carbon atom in the carbonate ion, CO 32-?

Solution: What is the oxidation state of the carbon atom in the carbonate ion, CO 32-?

Problem

What is the oxidation state of the carbon atom in the carbonate ion, CO 32-?


Solution

We’re being asked to determine the oxidation state of carbon in CO32– (carbonate ion).


The oxidation state of oxygen is:

• –1: in peroxides (X­2O2, X = Group 1A element)

–1/2:  in superoxides (XO2, X = Group 1A element)

• –2:  in other compounds


Since CO32– is neither a peroxide or superoxide, the oxidation state of each oxygen atom is –2


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