2 Binary Ionic Compounds Nomenclature w/ oxidation numbers The name of the cation (metal) is first. It will have its entire element name.The anion (nonmetal) will have its element name with its –ide endingFor exampleNaClSodium chloride
3 Try these examples ZnS Zinc Sulfide KCl Potassium Chloride BaO AlF3CaOZinc SulfidePotassium ChlorideBarium OxideAluminum FluorideCalcium Oxide
4 Oxidation Numbers Group 1 (IA) +1 Group 2 (IIA) +2 Group 13 (IIIA) +3 Group 14 (IVA) ±4Group 15 (VA) -3Group 16 (VIA) -2Group 17 (VIIA) -1
5 Criss Cross/Swap & Drop Method Write the symbol and charge for each element.The anion’s charge becomes the # of cationsThe cation’s charge becomes the # of anionsReduce if necessary. (if there is a common factor)
6 For exampleCalcium chlorideCa Cl 1-cation anionCaCl2
7 For exampleBarium sulfideBa S 2-cation anionBa2S2Reduce.BaS
8 Example KCl potassium chloride K 1+ Cl 1- cation anion The charge of your anion = the # of cations K1The charge of your cation = the # of anions Cl1Reduce if necessaryKCl
11 Writing Formulas without Oxidation Numbers The charge of transition metals will be given in parenthesis.Iron (III) oxideFe3+ O2-Use the criss cross method.Fe2O3
12 Try these examples Copper (II) iodide Tin (II) chloride Tin (IV) oxide Chromium (VI) sulfide
13 Naming Binary Ionic Compounds without oxidation numbers
14 Naming Binary Ionic Compounds without oxidation numbers *Use your reference sheet to determine ions of different transition metals.The cation (metal) will have its entire name with its charge in parentheses.The anion will have its element name with its –ide ending.You will need to reverse the criss cross method to find the cations charge.
15 Example CoI2 CoX1 I1-2 1(x) + (1-)(2) = 0 1x - 2=0 X= 2+ Cobalt (?) iodideUse the criss cross method in reverse.Write the element symbols with their subscripts and the charge of the anion.CoX1 I1-2Set up an equation equal to zero using the charges and number of each element. The charge of the cation is x (unknown). Then solve for x.1(x) + (1-)(2) = 01x - 2=0X= 2+
16 Try these examples Cu2Se FeS SnO2 Copper (I) selenide Iron (II) sulfideTin (IV) oxide
18 Tertiary Ionic Compounds Composed ofpositively charged Polyatomic ion + nonmetal (anion)Metal (cation) + negatively charged polyatomic ionTwo polyatomic ions (one positive and one negative charge)
19 Writing Formulas with oxidation #s Write symbol and charge for each element or polyatomic ionUse the crisscross method.Polyatomic ions must remain in parenthesis with the amount written outside as a subscript.i.e. 2 nitrate ions (NO3)2
20 Try these examplesMagnesium hydroxidePotassium sulfate
21 Naming Must be able to recognize polyatomic ions. Name the cation and (-) charge poly ionName the (+)polyatomic ion and name the anion.Name both polyatomic ion.
23 Naming Formulas without Oxidation Numbers Must include charge of the cation (transition metal).Will only include the tertiary ionic compounds with a cation (transition metal) and polyatomic ion.Name the cation with its charge. May require using the criss cross method reversed.Name the polyatomic ion.
24 The charge of your cation is the number of anions. Example: Sn3(PO4)2The charge of your cation is the number of anions.OrSnX3 (PO4)3-23x + (3-)(2)=03x-6=03x=6X=2+Tin (II) phosphate