Nomenclature

NomenclaturePOPO44

3-3-

phosphate ionphosphate ion

CC22HH33OO22--

acetate ionacetate ion

HC2H3O2

Acetic Acid

Common NamesCommon Names• A lot of chemicals have common A lot of chemicals have common

names as well as the proper names as well as the proper IUPAC name.IUPAC name.

• Chemicals that should always be Chemicals that should always be named by common name and named by common name and never named by the IUPAC never named by the IUPAC method are:method are:

• HH22OO water, not dihydrogen water, not dihydrogen

monoxidemonoxide

• NHNH33 ammonia, not nitrogen ammonia, not nitrogen

trihydridetrihydride

CATIONCATION + + ANIONANION = =

COMPOUNDCOMPOUND

CATIONCATION + + ANIONANION = =

COMPOUNDCOMPOUND

A neutral compound A neutral compound requiresrequires

equal number of + equal number of + and - charges.and - charges.

A neutral compound A neutral compound requiresrequires

equal number of + equal number of + and - charges.and - charges.

COMPOUNDCOMPOUNDS FORMED S FORMED FROM IONSFROM IONS

COMPOUNDCOMPOUNDS FORMED S FORMED FROM IONSFROM IONS

NaNa++ + Cl + Cl- - --> NaCl--> NaCl

Charges on Monatomic IonsCharges on Monatomic Ions

+1 +2 -3 -2 -1 0

Cd+2

IONIC COMPOUNDSIONIC COMPOUNDSIONIC COMPOUNDSIONIC COMPOUNDS

NH4+

Cl-

ammonium chloride, NHammonium chloride, NH44ClCl

Some Ionic CompoundsSome Ionic CompoundsSome Ionic CompoundsSome Ionic Compounds

MgMg2+2+ + N + N-3-3 ----> ---->

MgMg33NN22

magnesiummagnesium nitridenitride

SnSn4+4+ + O + O2-2- ----> ---->

SnOSnO22

Tin (IV) oxideTin (IV) oxide

calcium fluoridecalcium fluoride

CaCa2+2+ + 2 F + 2 F-- ---> ---> CaFCaF22

Formulas of Ionic CompoundsFormulas of Ionic Compounds

Formulas of ionic compounds are determined from the charges on the ions

atoms ions

–

Na + F : Na+ : F : NaF

sodium + fluorine sodium fluoride formula

Charge balance: 1+ 1- = 0

Monatomic IonsMonatomic Ions

Writing a FormulaWriting a Formula

Write the formula for the ionic compound that will form between Ba2+ and Cl.

Solution:

1. Balance charge with + and – ions

2. Write the positive ion of metal first, and the

negative ion Ba2+ Cl

Cl3. Write the number of ions needed as

subscripts BaCl2

Learning Check Learning Check

Write the correct formula for the compounds containing the following ions:

1. Na+, S2-

a) NaS b) Na2S c) NaS2

2. Al3+, Cl-

a) AlCl3 b) AlCl c) Al3Cl

3. Mg2+, N3-

a) MgN b) Mg2N3 c) Mg3N2

Solution Solution

1. Na+, S2-

b) Na2S

2. Al3+, Cl-

a) AlCl3

3. Mg2+, N3-

c) Mg3N2

Naming CompoundsNaming CompoundsNaming CompoundsNaming Compounds

• 1. Cation first, then anion

• 2. Monatomic cation = name of the element

• Ca2+ = calcium ion

• 3. Monatomic anion = root + -ide

• Cl = chloride

• CaCl2 = calcium chloride

Binary Ionic Compounds:Binary Ionic Compounds:

Naming Binary Ionic CompoundsNaming Binary Ionic Compounds

Examples:

NaCl

ZnI2

Al2O3

sodium chloride

zinc iodide

aluminum oxide


Complete the names of the following binary compounds:

Na3N sodium ________________

KBr potassium ________________

Al2O3 aluminum ________________

MgS _________________________

Transition MetalsTransition Metals

Elements that can have more than one possible

charge MUST have a Roman Numeral to

indicate the charge on the individual ion.

1+ or 2+ 2+ or 3+

Cu+, Cu2+ Fe2+, Fe3+

copper(I) ion iron(II) ion

copper (II) ion iron(III) ion

Names of Variable IonsNames of Variable Ions

These elements REQUIRE Roman Numerals because they can have more than one possible charge:

Transition metals and the metals in groups 4A and 5A (except Ag, Zn, Cd, and Al) require a Roman

Numeral.

FeCl3 (Fe3+) iron (III) chlorideCuCl (Cu+ ) copper (I) chlorideSnF4 (Sn4+) tin (IV) fluoridePbCl2 (Pb2+) lead (II) chloride

Fe2S3 (Fe3+)iron (III) sulfide

Examples of Older Names of Cations Examples of Older Names of Cations formed from Transition Metalsformed from Transition Metals


Complete the names of the following binary

compounds with variable metal ions:

FeBr2 iron (_____) bromide

CuCl copper (_____) chloride

SnO2 ___(_____ ) ______________

Fe2O3 ________________________

Hg2S ________________________

COCO33 -2-2 is carbonate is carbonate

HCOHCO33–– is hydrogen carbonate is hydrogen carbonate

HH22POPO44–– is dihydrogen phosphate is dihydrogen phosphate

HSOHSO44–– is hydrogen sulfate is hydrogen sulfate

Polyatomic IonsPolyatomic IonsPolyatomic IonsPolyatomic Ions

Ternary Ionic NomenclatureTernary Ionic Nomenclature

Writing Formulas

• Write each ion, cation first. Don’t show charges in the final formula.

• Overall charge must equal zero.• If charges cancel, just write symbols.• If not, use subscripts to balance charges.

• Use parentheses to show more than one of a particular polyatomic ion.

• Use Roman numerals indicate the ion’s charge when needed (stock system)

Ternary Ionic NomenclatureTernary Ionic Nomenclature

Sodium SulfateNa+ and SO4 -2

Na2SO4

Iron (III) hydroxideFe+3 and OH-

Fe(OH)3

Ammonium carbonateNH4

+ and CO3 –2

(NH4)2CO3


1. aluminum nitrate

a) AlNO3 b) Al(NO)3 c) Al(NO3)3

2. copper(II) nitrate

a) CuNO3 b) Cu(NO3)2 c) Cu2(NO3)

3. Iron (III) hydroxide

a) FeOH b) Fe3OH c) Fe(OH)3

4. Tin(IV) hydroxide

a) Sn(OH)4 b) Sn(OH)2 c) Sn4(OH)

Naming Ternary CompoundsNaming Ternary Compounds

Contains at least 3 elementsThere MUST be at least one polyatomic ion

Examples:

NaNO3 Sodium nitrate

K2SO4 Potassium sulfate

Al(HCO3)3 Aluminum bicarbonate

or

Aluminum hydrogen carbonate


Match each set with the correct name:

1. Na2CO3 a) magnesium sulfite

MgSO3 b) magnesium sulfate

MgSO4 c) sodium carbonate

2 . Ca(HCO3)2 a) calcium carbonate

CaCO3 b) calcium phosphate

Ca3(PO4)2 c) calcium bicarbonate

Mixed Practice!Mixed Practice!

Name the following:

1. Na2O

2. CaCO3

3. PbS2

4. Sn3N2

5. Cu3PO4

6. HgF2

Mixed Up… The Other WayMixed Up… The Other Way

Write the formula:

1. Copper (II) chlorate

2. Calcium nitride

3. Aluminum carbonate

4. Potassium bromide

5. Barium fluoride

6. Cesium hydroxide

Naming Molecular Naming Molecular CompoundsCompounds

CH4 methaneBCl3 boron trichloride

CO2 Carbon dioxide

All are formed from two or more nonmetals.

Ionic compounds generally involve a metal and nonmetal (NaCl)

Molecular (Covalent) NomenclatureMolecular (Covalent) Nomenclaturefor two for two nonnonmetalsmetals

• Prefix System (binary compounds)

1. Less electronegative atom comes first.

2. Add prefixes to indicate # of atoms. Omit mono- prefix on the FIRST element. Mono- is OPTIONAL on the SECOND element (in this class, it’s NOT optional!).

3. Change the ending of the second element to -ide.

PREFIXmono-di-tri-tetra-penta-hexa-hepta-octa-nona-deca-

NUMBER123456789

10

Molecular Nomenclature PrefixesMolecular Nomenclature Prefixes

• CCl4

• N2O

• SF6

• carbon tetrachloride

• dinitrogen monoxide

• sulfur hexafluoride

Molecular Nomenclature: ExamplesMolecular Nomenclature: Examples

• arsenic trichloride

• dinitrogen pentoxide

• tetraphosphorus decoxide

• AsCl3

• N2O5

• P4O10

More Molecular ExamplesMore Molecular Examples


Fill in the blanks to complete the following names of covalent compounds.

CO carbon ______oxide

CO2 carbon _______________

PCl3 phosphorus _______chloride

CCl4 carbon ________chloride

N2O _____nitrogen _____oxide


1. P2O5 a) phosphorus oxide

b) phosphorus pentoxide

c) diphosphorus pentoxide

2. Cl2O7 a) dichlorine heptoxide

b) dichlorine oxide

c) chlorine heptoxide

3. Cl2 a) chlorine

b) dichlorine

c) dichloride

Mixed Review Mixed Review

Name the following compounds:

1. CaOa) calcium oxide b) calcium(I) oxidec) calcium (II) oxide

2. SnCl4

a) tin tetrachloride b) tin(II) chloride

c) tin(IV) chloride

3. N2O3

a) nitrogen oxide b) dinitrogen trioxidec) nitrogen trioxide

Solution Solution

Name the following compounds:

1. CaO

2. SnCl4

3. N2O3

a) calcium oxide

c) tin(IV) chloride

b) Dinitrogen trioxide

Mixed PracticeMixed Practice

1. Dinitrogen monoxide

2. Potassium sulfide

3. Copper (II) nitrate

4. Dichlorine heptoxide

5. Chromium (III) sulfate

6. Iron (III) sulfite

7. Calcium oxide

8. Barium carbonate

9. Iodine monochloride

Mixed PracticeMixed Practice

1.1. BaIBaI22

2.2. PP44SS33

3.3. Ca(OH)Ca(OH)22

4.4. FeCOFeCO33

5.5. NaNa22CrCr22OO77

6.6. II22OO55

7.7. Cu(ClOCu(ClO44))22

8.8. CSCS22

9.9. BB22ClCl44

Acid NomenclatureAcid Nomenclature

• AcidsAcids

• Compounds that form HCompounds that form H++ in water. in water.

• Formulas usually begin with ‘H’.Formulas usually begin with ‘H’.

• Examples:Examples:

• HCl HCl (aq)(aq) – hydrochloric acid – hydrochloric acid

• HNOHNO33 – nitric acid – nitric acid

• HH22SOSO44 – sulfuric acid – sulfuric acid

Anion Ending Acid Name

-ide hydro-(stem)-ic acid

-ate (stem)-ic acid

-ite (stem)-ous acid

Acid Nomenclature ReviewAcid Nomenclature Review

No OxygenNo Oxygen

w/Oxygen w/Oxygen

Acid Nomenclature FlowchartAcid Nomenclature Flowchart

h yd ro - p re fix-ic en d in g

2 e lem en ts

-a te en d in gb ecom es-ic en d in g

-ite en d in gb ecom es

-o u s en d in g

n o h yd ro - p re fix

3 e lem en ts

AC ID Ss ta rt w ith 'H '

• HBr HBr (aq)(aq)

• HH22COCO33

• HH22SOSO33

• 2 elements, 2 elements, --ideide

• 3 elements, 3 elements, -ate-ate

• 3 elements, 3 elements, -ite-ite

hydrohydrobromic bromic

acidacid

carboncarbonicic

acidacid

sulfursulfurousous

acidacid


• hydrofluoric acidhydrofluoric acid

• sulfuric acidsulfuric acid

• nitrous acidnitrous acid

• 2 elements2 elements

• 3 elements, 3 elements, -ic-ic

• 3 elements, 3 elements, -ous-ous

HF HF (aq)(aq)

HH22SOSO44

HNOHNO22


HH++ F- F-

HH++ SO SO442-2-

HH++ NO NO22--

Name ‘Em!Name ‘Em!

• HI HI (aq)(aq)

• HClHCl

• HH22SOSO33

• HNOHNO33

• HIOHIO44

Write the Formula!Write the Formula!

• Hydrobromic acidHydrobromic acid

• Nitrous acidNitrous acid

• Carbonic acidCarbonic acid

• Phosphoric acidPhosphoric acid

• Hydrotelluric acidHydrotelluric acid

Now it’s Study TimeNow it’s Study Time

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Nomenclature

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