chapter 5 nomenclature chemistry b2a. 1.ionic compounds (a metal and a nonmetal) 2. covalent...
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Chapter 5
Nomenclature
Chemistry B2A
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1. Ionic compounds (a metal and a nonmetal)
2. Covalent compounds (two nonmetals)
Binary Compounds
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1. Ionic compounds (a metal and a nonmetal)
Binary Compounds
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Metals: lose 1, 2 or 3 e- Cation (Y+)
Nonmetals: gain 1, 2 or 3 e- Anion (X-)
Ions
Cation (Y+): Na+ Li+ Ca2+ Al3+
Anion (X-): Cl- F- O-2
Number of protons and neutrons in the nucleus remains unchanged.
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Transition elements
1A 2A 3A 4A 5A 6A 7A 8A
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Ionic bonds
Metal-Nonmetal
AnionCation
Opposite charges attract each other.
Na Na+ + e- Cl + e- Cl-
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Sodium (Na)
NaCl
Chlorine (Cl)
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Type I Monatomic Cations
Metal has only one type of cation (main group elements)
International Union of Pure and Applied Chemistry (IUPAC) systematic names
Name of the metal + “ion”
H+ Hydrogen ionLi+ Lithium ion
Ca2+ Calcium ionAl3+ Aluminum ion
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Type II Monatomic Cations
Metal has two (or more) type of cations (transition elements)
Cu1+ Copper(I) ionCu2+ Copper(II) ion
Fe2+ Iron(II) ionFe3+ Iron(III) ion
Hg+ Mercury(I) ionHg2+ Mercury(II) ion
Sn2+ Tin(II) ionSn4+ Tin(IV) ion
Co2+ Cobalt(II) ionCo3+ Cobalt(III) ion
Pb2+ Lead(II) ionPb4+ Lead(IV) ion
IUPAC or Systematic names
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Common name (old name)
Name of the metal +“-ous” smaller charge
“-ic” larger charge
Cu1+ Copper(I) ion Cuprous ionCu2+ Copper(II) ion Cupric ion
Fe2+ Iron(II) ion Ferrous ionFe3+ Iron(III) ion Ferric ion
Hg+ Mercury(I) ion Mercurous ionHg2+ Mercury(II) ion Mercuric ion
Sn2+ Tin(II) ion Stannous ionSn4+ Tin(IV) ion Stannic ion
Type II Monatomic Cations
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Naming Monatomic Anions
Stem part of name + “-ide”
Anion Stem name Anion name
F- fluor Fluoride ion
Cl- chlor Chloride ion
Br- brom Bromide ion
I- iod Iodide ion
O2- ox Oxide ion
S2- sulf Sulfide ion
P3- phosph Phosphide ion
N3- nitr Nitride ion
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matter are neutral (uncharged):
total number of positive charges = total number of negative charges
Na+ Cl- NaCl
Ca2+ Cl- CaCl2
Al3+ S2- Al2S3
Ba2+ O2- Ba2O2 BaO
Molecule of NaCl Formula of NaCl
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Naming Binary Ionic compounds
Name of metal (cation) + Name of anion
NaCl Sodium chlorideCaO Calcium oxide
Cu2O Copper(I) oxide Cuprous oxideCuO Copper(II) oxide Cupric oxide
CsBr Cesium bromideMgS Magnesium sulfide
FeCl2 Iron(II) chloride Ferrous chlorideFeCl3 Iron(III) chloride Ferric chloride
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1. Ionic compounds (a metal and a nonmetal)
2. Covalent compounds (two nonmetals)
Binary Compounds
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2. Covalent compounds (two nonmetals)
Binary Compounds
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Naming Binary Covalent compounds (type III)
Mono – Di – Tri – Tetra – Penta – Hexa – Hepta – Octa – Nona – Deca
1. Don’t use “mono” for the 1st element.
2. Drop the “a” when followed by a vowel.
prefix and full name of the first element in formula + prefix and the anion nameof the second element + “ide”
1 2 3 4 5 6 7 8 9 10
Rules:
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PCl5 Phosphorous pentachloride SF6 Sulfur hexafluoride
Naming Binary Covalent compounds (type III)
NO2 Nitrogen dioxide
N2O4 Dinitrogen tetroxide
CCl4 Carbon tetrachloride
S2O3 Disulfur trioxide
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Binary Compounds
Metal present?
Yes
Does the metal form more than one cation?
YesNo
YesNo
Type IUse the element name
for the cation
Type IIFind the charge of the cation
Use a Roman number after theelement name.
Type IIIUse prefixes
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Naming Polyatomic Ionic Compounds
They contain more than two elements.
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Naming Polyatomic Ions
Cation: NH4+ Ammonium
Anion:
OH- Hydroxide
NO2- Nitrite
NO3- Nitrate
SO32- Sulfite
SO42- Sulfate
HSO3- Hydrogen Sulfite
(bisulfite)
HSO4- Hydrogen sulfate
(bisulfate)
MnO4- Permanganate
CrO42- Chromate
Cr2O72- Dichromate
CO32- Carbonate
HCO3- Hydrogen Carbonate
(bicarbonate)
PO33- Phosphite
PO43- Phosphate
HPO42- Hydrogen phosphate
H2PO4- Dihydrogen phosphate
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Oxyanions
Polyatomic anions with different numbers of oxygen atoms.
NO2- Nitrite
NO3- Nitrate
SO32- Sulfite
SO42- Sulfate
HSO3- Hydrogen Sulfite
(bisulfite)
HSO4- Hydrogen sulfate
(bisulfate)
PO33- Phosphite
PO43- Phosphate
HPO42- Hydrogen phosphate
H2PO4- Dihydrogen phosphate
Smaller number of oxygen atoms ends with –ite.Larger number of oxygen atoms ends with –ate.
When we have two oxyanions in a series:
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Oxyanions
When we have more than two oxyanions in a series:
(Fewest oxygen atoms) Prefix hypo-
(Most oxygen atoms) Prefix per-
ClO-
hypochlorite
ClO2- chlorite
ClO3- chlorate
ClO4- perchlorate
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matter are neutral (uncharged):
total number of positive charges = total number of negative charges
Na+ NO3- NaNO3
Ca2+ CO32- Ca2(CO3)2 Ca(CO3)
Al3+ SO42- Al2(SO4)3
Mg2+ NO2- Mg(NO2)2
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Naming Polyatomic Ionic compounds
Name of metal (cation) + Name of anion
NaNO3
Ca(CO3)
Al2(SO4)3
Mg(NO2)2
Sodium nitrate
Calcium carbonate
Aluminum sulfate
Magnesium nitrite
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Naming Polyatomic Ionic compounds
Name of metal (cation) + Name of anion
FeCO3
Fe2(CO3)3
Iron(II) carbonate
Iron(III) carbonate
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Naming acids
Acids: sour
They produce H+ (proton) in water.
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Naming binary acids
Hydro -ide ion -ic acidAnion :+
HF F-: flouride ion Hydroflouric acid
HCl Cl-: chloride ion Hydrochloric acid
H2S S2-: sulfuride ion Hydrosulfuric acid
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Naming Polyatomic Acids
Anion: -ite ion -ous acid
-ate ion -ic acid
HNO3 NO3-: Nitrate ion Nitric acid
HNO2 NO2-: Nitrite ion Nitrous acid
H2CO3 CO32-: Carbonate ion Carbonic acid
H2SO3 SO32-: Sulfurite ion Sulfurous acid