How to Find the Charge on the Carbonate Ion

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There are two ways to determine the charge on the Carbonate ion (CO3 2-). The first, and probably quickest is to just memorize that the Sulfate ion has a charge of 2- . [Note that the - sign goes after the number for ions.] • The second way is to calculate the formal charge for the ion. While this is effective, it is time consuming. For this reason it is a good idea to understand how to find the charge of the Carbonate ion but then memorize that it is 2-. • ---- Helpful Videos ---- • Memorizing the Polyatomic Ions: • Memorizing and Using the List of Poly... • Formal Charge Practice Video: • Formal Charge Practice Problems with ... • Finding the Charge on Ion: • Figuring out the Charge on Ions • Introduction to Writing Electron Configurations: • Introduction to Electron Configurations • How to Draw Lewis Structures: • How to Draw Lewis Structures: Five Ea... • Finding Valence Electrons (element): • Finding the Number of Valence Electro... • Note that when we look at the charge on ions, it is important to understand that ions come in pairs. In an ionic compound like CsCl, the Cs is a positive ion (Cs+) and has transferred/lost an electron to the Chlorine atom which now has an extra electron and is negative (Cl-). We can dissolve CsCl in water and it will split apart into Cs+ and Cl-. The electron from the Cs is now with the Cl. • For more help with chemistry visit www.Breslyn.org

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