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Ionic Compounds: Naming. First Step in Naming. Find metal If metal has only one oxidation state it’s easy If metal has more than one oxidation state, there’s an extra step. Naming Binary Ionic Compounds. Always name metal (+ ion) first 2. Write stem nonmetal (- ion)
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First Step in Naming • Find metal • If metal has only one oxidation state it’s easy • If metal has more than one oxidation state, there’s an extra step
Naming Binary Ionic Compounds • Always name metal (+ ion) first 2. Write stemnonmetal (- ion) 3. Add ending “ide” to nonmetal
Hydrogen = hydr • Nitrogen = nitr • Oxygen = ox • Fluorine = fluor • Chlorine = chlor • Bromide = brom • Iodide = iod • Phosphorus = phosph • Sulfur = sulf • Tellurium = tellur • Sellenium = selen • Arsenic = arsen
Metals with one oxidation state • CaO • BaS • AlN • LiCl • Al2Se3 • Na2O • K3N • MgF2 Calcium Oxide Barium Sulfide Aluminum Nitride Lithium Chloride Aluminum Selenide Sodium Oxide Potassium Nitride Magnesium Fluoride
Metals with > 1 oxidation state • Use formula to figure out oxidation state metal • Ex: Fe can be Fe+2or Fe+3 • Name FeO and Fe2O3 • 2 different compounds • cannot name both iron oxide • every formula has 1 name only
FeO and Fe2O3 • Compounds are electrically neutral • Oxygen is -2 1 O (-2) FeO so Fe must be +2 Name: Iron (II) oxide (II = 2 for +2 charge on Fe)
So each Fe is +3 Iron (III) oxide FeO and Fe2O3 O is -2 Fe2O3 3 O’s [3 x (-2) = -6] total negative charge Total positive charge must be +6
Titanium (III) chloride Manganese (IV) oxide • TiCl3 • Mn2O4 • Co2O3 • PdBr2 • AuCl3 • MoN • MnO • TiO Cobalt (III) oxide Palladium (II) bromide Gold (III) chloride Molybdenum (III) nitride Manganese (II) oxide Titanium (II) oxide
Summary for Binary Ionic Compounds • Formula: positive first, always • metal> 1 oxidation state, name needs roman numeral • Name = metal + stem nonmetal + ide