Examples of Inorganic Nomenclature and Charges of Ions: CATIONS ANIONS Formula Name Formula Name Li+ lithium ion N3– nitride ion Na+ sodium ion P3– phosphide ion K+ potassium ion O2– oxide ion Rb+ rubidium ion S2– sulfide ion Cs+ cesium ion Se2– selenide ion Mg2+ magnesium ion F– fluoride ion Ca2+ calcium ion Cl– chloride ion Sr2+ strontium ion Br– bromide ion Ba2+ barium ion I– iodide ion Cr2+ chromium(II) ion CN– cyanide ion Cr3+ chromium(III) ion OH– hydroxide ion 2+ 2– Mn manganese(II) ion CO3 carbonate ion 2+ – Fe iron(II) ion HCO3 hydrogen carbonate ion (bicarbonate ion) 3+ – Fe iron(III) ion NO3 nitrate ion 2+ – Co cobalt(II) ion NO2 nitrite ion 3+ 3– Co cobalt(III) ion PO4 phosphate ion 2+ 2– Ni nickel(II) ion HPO4 hydrogen phosphate ion + – Cu copper(I) ion H2PO4 dihydrogen phosphate ion 2+ 3– Cu copper(II) ion PO3 phosphite ion 2+ 3– Sn tin(II) ion AsO4 arsenate ion 4+ 2– Sn tin(IV) ion SO4 sulfate ion 2+ – Zn zinc ion* HSO4 hydrogen sulfate ion 3+ 2– Al aluminum ion* SO3 sulfite ion + – Ag silver ion* ClO4 perchlorate ion 2+ – Cd cadmium ion* ClO3 chlorate ion + – NH4 ammonium ion ClO2 chlorite ion + – **CH3NH3 methylammonium ion** ClO hypochlorite ion + – **(CH3)2NH2 dimethylammonium ion** BrO4 perbromate ion + – **(CH3)3NH trimethylammonium ion** BrO3 bromate ion – BrO2 bromite ion BrO– hypobromite ion – IO4 periodate ion – IO3 iodate ion – IO2 iodite ion IO– hypoiodite ion – CH3COO acetate ion CHOO– formate ion – MnO4 permanganate ion 2– CrO4 chromate ion 2– Cr2O7 dichromate ion * no Roman numerals a necessary since the ion only exists in one oxidation state ** for Chem 102 Required Weak Acids and Weak Base Nomenclature for Chem 102: (See notes for required acids and bases for Chem 101) WEAK ACIDS WEAK BASES Formula Name Formula Name CH3COOH acetic acid NH3 ammonia CHOOH formic acid CH3NH2 methylamine HCN(aq) hydrocyanic acid (CH3)2NH dimethylamine HF(aq) hydrofluoric acid (CH3)3N trimethylamine HClO hypochlorous acid HBrO hypobromous acid HNO2 nitrous acid For interest: .