Topic: Naming Ionic Compounds Do Now: Write formulas for the following 1. Na and Cl 2. Mg and I 3. Al and S Na +1 Cl -1 = NaCl Mg +2 I -1 = MgI 2 Al +3 S -2 = Al 2 S 3

Naming Binary Ionic Compounds there is a flow chart for you to use add to your reference table packet 1. Always name metal (the cation/+ ion) first 2. Leave a space stem 3. Write stem of nonmetal (the anion/ - ion) and Add ending “ide” to nonmetal Binary = only 2 types of elements (two capital letters)

Stems of nonmetals Iod Brom Chlor Fluor Hydr is the stem for H Tellur SelenArsen SulfPhosph OxNitr

Metals with one oxidation state CaO BaS AlN LiCl Al 2 Se 3 Na 2 O K 3 N MgF 2 Calcium Oxide Barium Sulfide Aluminum Nitride Lithium Chloride Aluminum Selenide Sodium Oxide Potassium Nitride Magnesium Fluoride

The First Step in Naming Find metal on PT If metal has only one oxidation state it’s easy If metal has more than one oxidation state, there’s an extra step

Metals with more than 1 oxidation state Use formula to figure out which oxidation state metal ion hasUse formula to figure out which oxidation state metal ion has orEx: Fe can be Fe +2 or Fe +3 »FeO vs Fe 2 O 3 – two different – two different compounds so cannot both be called iron oxide or –so we have to use Roman Numeral to Tell which Fe (Fe +2 or Fe +3 ) we are using – Iron (II) Oxide –uses Fe +2 – Irons (III) Oxide – use Fe +3

When deterring Oxidation State of Metal being used, assigned the nonmetal it’s oxidation number first (will be the top oxidation number from the PT)

FeO Compounds are electrically neutral Oxygen is -2 FeO Name: Iron (II) oxide but means Iron (+2) Oxide (roman numeral II = charge on Fe is +2) 1 O which is -2 so Fe must be +2 so Fe must be +2

FeO and Fe 2 O 3 Fe 2 O 3 Each O is -2 There are 3 O’s 3 X (-2) = -6 Total negative charge Total positive charge must be +6 Each Fe is +3 Name: Iron (III) oxide but means Iron (+3) Oxide (roman numeral III = charge on Fe is +3)

Name the following TiCl 3 MnO 2 Co 2 O 3 PdBr 2 AuCl 3 MoN MnO TiO Titanium (III) chloride Manganese (IV) oxide Cobalt (III) oxide Palladium (II) bromide Gold (III) chloride Molybdenum (III) nitride Manganese (II) oxide Titanium (II) oxide

Summary for Binary Ionic Compounds Compounds are electrically neutral Formula: positive first If metal has more than 1 oxidation state, name has roman numeral (MOST ALL TRANSITION METALS need this) Name = metal + stem of nonmetal + ide

Some ionic compounds have a polyatomic ion – see table E EXAMPLE KOH - K = metal (positive ion) and OH = polyatomic ion (negative ion) MgSO 4 – Mg = metal (positive ion) and SO 4 = polyatomic ion (negative ion)

Naming compounds with polyatomics polyatomic ions have names (Table E) naming is parallel to binary naming positive always written first if (+)’ve ion is a metal, check to see how many oxidation states it has –if > 1 then name must have roman numeral if (–)’ve is polyatomic - 2 nd part of name is name of polyatomic (don’t modify ending)

Name the following NaOHNaOH KHCO 3KHCO 3 LiNO 3LiNO 3 CaSO 4CaSO 4 Al(NO 3 ) 3Al(NO 3 ) 3 Fe(OH) 2Fe(OH) 2 CuSO 4CuSO 4 CuSCNCuSCN Sodium hydroxide Potassium hydrogen carbonate Lithium nitrate Calcium sulfate Aluminum nitrate Iron (II) hydroxide Copper (II) sulfate Copper (I) thiocyanate