Names-Mole-Avogadro - Nomenclature of Ionic Compounds...

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Nomenclature of Ionic Compounds : Cations (metal loses e - ): no change Anions (non-metal gains e - ): “-ide” (halides) Subscripts do not affect name Transition Metal Cations: (II) or (III) or (IV) – oxidation states Polyatomic Ions: 1) “-ium” (NH 4 + , H 3 O + ) 2) oxoanions more O = “-ate”; less O = “-ite” least O = “hypo-”; most O = “per-” H+oxoanion = “hydrogen….” or “bi…” Hydrates Greek prefixies (mono, di, tri, tetra, penta, hexa, hepta, octa, nona, deca) Ex: CaSO 4 •5H 2 O = calcium sulfate pentahydrate (heat CaSO 4 = anhydrous calcium sulfate Acids: Binary Acids (gaseous cmpds diss. in water): “hydro—ic acid” Oxoacids: “-ate” oxoanion “-ic acid”; “-ite” oxoanion “-ous acid”; “per…ate” oxoanion “per…ic acid”
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Nomenclature of Binary Covalent Compounds Combination of non-metals usually Some commonly named (H 2 O, NH 3 , CH 4 ) Most systematically named: Second-named element ends in “-ide” (see below) Greek prefixes unless first element is mono (below)
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