Topic: Naming Ionic Compounds

Do Now: Which element forms a compound with chlorine with the general formula MCl2 (where M is

your unknown element)

A. Rb B. MgC. Na D. Rn

Naming Binary Ionic Compoundsthere is a flow chart for you to use

in the front of your packet1. Always name metal (the cation/+ ion) first

2. Leave a space

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• Al2Se3

• Na2O• K3N• MgF2

Calcium Oxide

Barium Sulfide

Aluminum Nitride

Lithium Chloride

Aluminum Selenide

Sodium OxidePotassium 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 has

• Ex: Fe can be Fe+2 or Fe+3

»FeO vs Fe2O3

– two different compounds so cannot both be called iron oxide

– 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

FeO and Fe2O3

Fe2O3

Each O is -2

There are 3 O’s3 X (-2) = -6Total 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

• TiCl3• MnO2

• Co2O3

• PdBr2

• AuCl3• 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

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 - 2nd part of name is name of polyatomic (don’t modify ending)

Name the following

• NaOH• KHCO3

• LiNO3

• CaSO4

• Al(NO3)3

• Fe(OH)2

• CuSO4

• CuSCN

Sodium hydroxide

Potassium hydrogen carbonate

Lithium nitrate

Calcium sulfate

Aluminum nitrate

Iron (II) hydroxide

Copper (II) sulfate

Copper (I) thiocyanate