1.2.3: Polyatomic Ions
Learning Objectives
- Give the name, formula, and charge of specific polyatomic ions.
Polyatomic Ions
As the name implies, a polyatomic ion is a charged molecule. Many polyatomic ions exist, but in CHE 101 we expect that you will learn the name, formula, and charge of these specific ions.
| 1+ | ammonium ion | NH 4 +1 |
| 1- | hydrogen carbonate (bicarbonate) ion | HCO 3 -1 |
| hydrogen sulfate (bisulfate) ion | HSO 4 -1 | |
| nitrite ion | NO 2 -1 | |
| nitrate ion | NO 3 -1 | |
| cyanide ion | CN -1 | |
| hydroxide ion | OH -1 | |
| dihydrogen phosphate ion | H 2 PO 4 -1 | |
| 2- | carbonate ion | CO 3 -2 |
| sulfate ion | SO 4 -2 | |
| monohydrogen phosphate ion | HPO 4 -2 | |
| 3- | phosphate ion | PO 4 -3 |