Chapter 8
Nomenculature
Chemical Nomenculature
A system of naming compounds.
IUPAC rules are designed to name
compounds.
Common names: H2O-water.
Ionic- metal+nometal.
molecular- nonmetals.
Exceptions: polyatomic ions.
Practice Ex 8.1-Pg.255.
Types of Binary Ionic
compounds:
Binary: Compound in which only two
elements are present.
Binary ionic compound: Compound in
which monoatomic +ve charged metal ions
and monoatomic –ve charged nonmetal
ions are present.
Types of Binary Ionic
compounds
Fixed charge binary ionic compound: Metal ion
can form only one type of +ve ion.
Fixed charge metals are group I A, II A,Al3+,
Ga3+, Zn2+,Cd2+, Ag+
Variable charge binary ionic compound: Metal
ion can form more than one type of +ve ion.
Cr2+, Cr3+, Co2+, Co3+, Cu+, Cu2+, Au+,
Au3+, Fe2+, Fe3+, Pb2+, Pb4+, Sn2+, Sn4+,
Mn2+, Mn3+
Nomenculature for binary ionic
compounds
Fixed charged metals take the full name of the
element plus the word “ion”
Na+-sodium ion
Variable charged metal ions take the full name
of the element followed by a roman numeral( )
plus the word ion.
Cu2+ - copper (II) ion.
Nonmetal ions=stem of the name+ ide + word”
ion”
Cl- chloride ion.
Learn table 8.2-P.258
Name the following:
KCl
Na2O
MgF2
Be3N2
CuO
Cu2O
AuCl3
Mn2S3
Do Practice Ex: 8.2,8.3 P.259.
The ic and ous system.
Higher-ic
Lower-ous.
Table 8.3 P.261.
Write formulas for the following:
iron (III) choride:
tin (II) fluoride
stannic bromide
auric oxide
plumbous fluoride
ferrous bromide
ferric bromide
copper(III) chloride
Nomenculature for ionic
compounds containing
polyatomic ions:
Learn table 8.4- P. 263.
If the polyatomic ion is +ve, its name is
substituted that for metal.
If the polyatomic ion is –ve, its name is
substituted for the nonmetal stem plus ide.
Nomenculature for ionic
compounds containing
polyatomic ions:
Na3PO4
K2CO3
Fe3(NO3)3
Co(NO3)2
Cu2SO4
Fe2 (SO4 )3
NH4CN
(NH4)3 PO4
Ternary compound
A compound containing three different
elements.
Nomenculature for Binary
Molecular Compounds
A molecular compound in which only 2
nonmetals are present.
1. Name of first nonmetal used in full.
2. Stem of the name of second nonmetal
+ ide ending
3. Appropriate suffix used.
Table 8. 5, P.266.
Name the following:
CCl4
NCl3
CO
P4 S6
S4 N4
S2O
PF3
CF4
Exception: H2SHCl-
Systematic Name
A name of a compound based on IUPAC
rules that conveys information about the
composition of the compound.
Common Name
Name of a compound not based on IUPAC
rules and that does not convey the
information about the composition of the
compound.
Learn table 8.6- Common Names.P.268
Nomenculculature for acids:
Acid: A H containing compound that yields
Hydrogen ions when dissolved in water.
Ex: HCl, HNO3, H2SO4, HCN, H3PO4
Rules for Naming acids
1.Name of negative ion ends with ide.
the prefix hydro + stem of the negative ion + suffix
ic+ the word acid
2. Name of negative ion ends with ate
Name of –ve ion less ate ending + suffix ic + word
acid.
3.Name of negative ion ends with ite.
Name of –ve ion less ite ending + suffix ous+ the
word acid.
Name the following:
Name the following acids:
H2CO3
HClO3
HF
HClO2
H2SO4
HClO
HBr
HClO4
Nonoxy acid
Composed of H and other nonmetals other
than oxygen that produce H+ in aqueous
solution.
Oxy acid
Composed of H, O, other elements that
produce H+ in aqueous solution.
Table 8.7:P.272:aq and dry state
nomenculatures.
Do Practice Ex: 8.9, 8.10-Pg. 275
Homework problems
P.276: 1,3,9,13,15, 19, 23, 25, 27, 29, 31,
35, 37, 39, 41, 49, 51, 53, 55, 57, 61, 63,
65, 67, 71, 73, 79, 81, 83, 85, 87, 101,
103, 115, 119.