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# Complex ion

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An ion consisting of multiple atoms associated together by [covalent bond]?s which can be considered as acting as a single unit in the context of acid/base chemistry or in the formation of salts.

Some commonly-occuring complex ions and their charges are indicated below

     carbonate    CO32-

     bicarbonate  HCO3-

     nitrate      NO3-

     phosphate    PO43-

     sulfate?      SO42-

     acetate?      CH3C(=O)O-

     ammonium?     NH4+

     hydroxide?    OH-

     pyridinium?   C5H5NH+

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Last edited July 29, 2001 2:48 pm (diff)
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