Nomenclature of other Polyatomic ions

Nomenclature of other Polyatomic ions - NH 3 H = NH 4 ammon...

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Nomenclature of other Polyatomic ions Polyatomic ions contain more than one kind of atom. You have already learned the polyatomic oxo anions (those ending in 'ate' and 'ite'). Some other common polyatomic ions are discussed below and summarized in a table at the bottom of the page. The hydrogen ion (H + ) can be coupled with 2- or 3- anions to create new ions. For example: phosphate= PO 4 3- hydrogen phosphate= HPO 4 2- dihydrogen phosphate= H 2 PO 4 - Note that the charge goes up by one for every hydrogen added. H + can also be combined with the molecule ammonia to make the POSITIVE ion ammonium (Note that it is the only polyatomic CATION we have encountered so far):
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Unformatted text preview: NH 3 + H + = NH 4 + ammon ia ammon ium ion H + combined with the oxide ion makes hydr oxide: O 2-+ H + = OH -oxide hydroxide The cyanide ion, CN-, doesn't fit in any of these categories but is an important ion all the same. Here is a summary of the remaining polyatomic ions to learn: More polyatomic ions to learn: Ammonium ... NH 4 + ... 1+ ion Hydroxide OH-1- ions Cyanide CN-Hydrogen carbonate HCO 3- Hydrogen sulfate HSO 4- Dihydrogen phosphate H 2 PO 4-Hydrogen phosphate HPO 4 2- 2- ions...
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This note was uploaded on 02/10/2009 for the course CHEMISTRY 105 taught by Professor Brozak during the Spring '09 term at Washington State University .

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