Ionic Compounds: Naming

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Ionic Compounds Naming
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Naming Binary Ionic Compounds

• Always name the metal (the cation/ ion) first
• 2. Write stem of nonmetal (the anion/ - ion)
• 3. Add the ending ide to the nonmetal

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Stems of nonmetals
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The First Step in Naming

• Find the metal on the PT
• If the metal has only one oxidation state its
  easy
• If the metal has more than one oxidation state,
  theres an extra step

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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
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Metals with 1 oxidation state

• Use the formula to figure out which oxidation
  state the metal ion has
• Ex Fe can be Fe2 or Fe3
• Name FeO and Fe2O3
• two different compounds
• cannot name both iron oxide
• every formula has 1 name only

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FeO and Fe2O3

• Compounds are electrically neutral
• Oxygen is -2

1 O which is -2
FeO
so Fe must be 2
Name Iron (II) oxide (roman numeral II
charge on Fe)
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FeO and Fe2O3

• Compounds are electrically neutral
• Oxygen is -2

Each O is -2
Fe2O3
There are 3 Os 3 X (-2) -6 Total negative
charge
Total positive charge must be 6
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Name the followingHint Positive Always First
Titanium (III) chloride

• TiCl3
• Mn2O4
• Co2O3
• PdBr2
• AuCl3
• MoN
• MnO
• TiO

Manganese (IV) oxide
Cobalt (III) oxide
Palladium (II) bromide
Gold (III) chloride
Molybdenum (III) nitride
Manganese (II) oxide
Titanium (II) oxide
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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
  oppositely-charged ions

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Ternary Compounds

• contain 3 or more elements
• usually contain a polyatomic ion
• if polyatomic is () its bonded to a nonmetal
• if polyatomic is () its bonded to a metal
• sometimes 2 polyatomics are bonded together

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Formulas with polyatomics

• Whats the formula for the compound formed from
  NH41 and Cl-1?
• The charges must add up to zero, so just write
  the symbols, positive first!

NH4Cl
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Try a few more
NaOH

• Na and OH-
• K and HCO3-1
• Mg2 and CO3-2
• Li and NO3-
• NH4 and CN-
• Ca2 and SO4-2

KHCO3
MgCO3
LiNO3
NH4CN
CaSO4
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These are more challenging
Mg3(PO4)2

• Mg2 and (PO4)-3
• (NH4)1 and S-2
• Al3 and (NO3)-1
• Fe2 and OH-1
• Hg22 and SCN-1
• Mg2 and HCO3-
• Al3 and C2O42-

(NH4)2S
Al(NO3)3
Fe(OH)2
Hg2(SCN)2
Mg(HCO3)2
Al2(C2O4)3
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Some of the most challenging are
Zn(NO3)2

• Zinc Nitrate ion
• Magnesium Hydroxide ion
• Lithium Carbonate ion
• Ammonium ion Bromine
• Potassium Sulfate ion
• Calcium Phosphate ion
• Beryllium Chlorate ion
• Ammonium ion Sulfate ion

Mg(OH)2
Li2CO3
NH4Br
K2SO4
Ca3(PO4)2
(NH4)2SO4
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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 name must have a roman numeral
• if ()ve is polyatomic - 2nd part of name is
  name of polyatomic (dont modify ending)

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Name the following
Sodium hydroxide

• NaOH
• KHCO3
• LiNO3
• CaSO4
• Al(NO3)3
• Fe(OH)2
• CuSO4
• CuSCN

Potassium hydrogen carbonate
Lithium nitrate
Calcium sulfate
Aluminum nitrate
Iron (II) hydroxide
Copper (II) sulfate
Copper (I) thiocyanate
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Summary for Binary Ionic Compounds

• Compounds are electrically neutral
• Formula positive first, always
• If metal has more than 1 oxidation state, name
  has a roman numeral
• Name metal stem of nonmetal ide