1. Ionic Compounds: Naming

2. Naming Binary Ionic Compounds 1.Always name metal (the cation/+ ion) first stem 2. Write stem of nonmetal (the anion/ - ion) 3. Add ending “ide” to nonmetal

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

4. 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

5. 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

6. Metals with > 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 Name FeO and Fe 2 O 3 – two different – two different compounds – cannot name both iron oxide – every formula has 1 name only

7. FeO and Fe 2 O 3 Compounds are electrically neutral Oxygen is -2 FeO Name: Iron (II) oxide (roman numeral II = charge on Fe) 1 O which is -2 so Fe must be +2 so Fe must be +2

8. FeO and Fe 2 O 3 Compounds are electrically neutral Oxygen is -2 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 Iron (III) oxide

9. Name the following TiCl 3 Mn 2 O 4 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

10. POLYATOMIC IONS group of covalently bonded atoms that have a charge Table E: (+)’ve or (–)’ve polyatomic ions have “names” (-) polyatomic ions can form ionic bonds with (+) metal ions SO 4 2- CO 3 2- PO 4 3- OH -

11. Ternary Compounds contain 3 or more elements usually contain a polyatomic ion –if polyatomic is (+) it’s bonded to a nonmetal –if polyatomic is (–) it’s bonded to a metal –sometimes 2 polyatomics are bonded together

12. Formulas with polyatomics What’s the formula for the compound formed from Al +3 and SCN -1 ? The charges must add up to zero, so write the symbols, positive first! AlSCN 3

13. Try a few more: Na +1 and OH -1 K +1 and HCO 3 -1 Mg +2 and CO 3 -2 Li +1 and NO 3 -1 Ca +2 and SO 4 -2 NaOH KHCO 3 MgCO 3 LiNO 3 CaSO 4

14. These are more challenging: Mg +2 and (PO 4 ) -3 Al +3 and (NO 3 ) -1 Fe +2 and OH -1 Hg 2 +2 and SCN -1 Mg +2 and HCO 3 - Al +3 and C 2 O 4 2- Mg 3 (PO 4 ) 2 Al(NO 3 ) 3 Fe(OH) 2 Hg 2 (SCN) 2 Mg(HCO 3 ) 2 Al 2 (C 2 O 4 ) 3

15. Some of the most challenging are Zinc + Nitrate ion Magnesium + Hydroxide ion Lithium + Carbonate ion Potassium + Sulfate ion Calcium + Phosphate ion Beryllium + Chlorate ion Zn(NO 3 ) 2 Mg(OH) 2 Li 2 CO 3 K 2 SO 4 Ca 3 (PO 4 ) 2 Be (ClO 3 ) 2

16. 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)

17. 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

18. Summary for Binary Ionic Compounds Compounds are electrically neutral Formula: positive first If metal has more than 1 oxidation state, name has roman numeral Name = metal + stem of nonmetal + ide