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Common Polyatomic Anions (& Corresponding Acids)
Names, Formulas and Charges
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| A | B |
| CO3 2- | carbonate ion |
| H2CO3 | carbonic acid |
| HCO3- | hydrogen carbonate acid |
| SiO3 2- | Silicate ion |
| NO3- | nitrate ion |
| HNO3 | nitric acid |
| NO2- | nitrite ion |
| HNO2- | nitrous acid |
| PO4 3- | phosphate ion |
| H3PO4 | phosphoric acid |
| H2PO4- | dihydrogen phosphate ion |
| AsO4 3- | arsenate ion |
| H3AsO4 | arsenic acid |
| SbO4 3- | antimonate ion |
| SO4 2- | sulfate ion |
| H2SO4 | sulfuric acid |
| HSO4- | hydrogen sulfate ion |
| SO3 2- | sulfite ion |
| H2SO3 | sulfurous acid |
| H2SO3- | hydrogen sulfite |
| SeO4 2- | selenate ion |
| SeO3 2- | selenite ion |
| H2SeO4 | selenic acid |
| H2SeO3 | selenous acid |
| TeO4 2- | tellurate ion |
| TeO3 2- | tellurite ion |
| H2TeO4 | telluric acid |
| ClO4- | perchlorate ion |
| HClO4 | perchloric acid |
| ClO3- | Chlorate ion |
| HClO3 | chloric acid |
| ClO2- | chlorite ion |
| HClO2 | Chlorous acid |
| ClO- | hypochlorite ion |
| HClO | hypochlorous acid |
| BrO4- | perbromate ion |
| HBrO4 | perbromic acid |
| BrO3- | bromate ion |
| HBrO3 | bromic acid |
| BrO2- | bromite ion |
| HBrO2 | bromous acid |
| BrO- | hypobromite ion |
| HBrO | hypobromous acid |
| IO4- | periodate ion |
| HIO4 | periodic acid |
| IO3- | iodate ion |
| HIO3 | iodic acid |
| IO2- | iodite ion |
| HIO2 | iodous acid |
| IO- | hypoiodite ion |
| HIO | hypoiodous acid |
| C2H3O2- | acetate ion |
| HC2H3O2 | acetic acid |
| C2O4 2- | oxalate ion |
| H2C2O4 | oxalic acid |
| OH- | hydroxide ion |
| MnO4- | permanganate ion |
| CrO4 2- | chromate ion |
| Cr2O7 2- | dichromate ion |
| S2O3 2- | thiosulfate ion |
| CN- | cyanide ion |
| CNO- | cyanate ion |
| CNS- | thiocyanate ion |
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Spanish Instructor |
Ohio Northern University |
| Ada, OH |
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