Oxidation Numbers Worksheet KEY Oxidation Numbers Rules top of table takes priority F 1 1 or 2 1A or 2A H O Other 7A 1 2 1 1 Give the oxidation number of the sulfur in the following molecules and ions Molecule Oxidation Number SO SO2 SO3 2 SO3 2 SO4 H2S S8 H2SO4 S 2 HS 1 2 4 6 4 6 2 0 6 2 2 6 Total Charge 2 0 0 0 2 Individual Charge 2 Atom S O 2 2 4 4 4 2 S O2 6 6 6 2 S O3 4 4 6 2 S O3 Total Charge 8 2 2 2 0 2 6 8 0 1 2 1 Individual Charge 2 1 2 1 6 2 1 2 1 Oxidation Numbers Worksheet KEY Oxidation Numbers Rules top of table takes priority F 1 1 or 2 1A or 2A H O Other 7A 1 2 1 6 Atom S O4 H2 S H2 S O4 H S 2 Oxidation Numbers Worksheet KEY Oxidation Numbers Rules top of table takes priority F 1 1 or 2 1A or 2A H O Other 7A 1 2 1 2 Give the oxidation number of the chlorine in the following molecules and ions Molecule Oxidation Number ClO2 ClO 1 ClO2 1 ClO3 1 ClO4 1 4 1 3 5 7 Total Charge Individual Charge Atom 4 4 4 2 Cl O2 1 1 2 2 Cl O 1 1 3 3 4 2 Cl O2 0 1 Total Charge Individual Charge Atom 5 5 6 2 Cl O3 1 7 7 8 2 Cl O4 3 Oxidation Numbers Worksheet KEY Oxidation Numbers Rules top of table takes priority F 1 1 or 2 1A or 2A H O Other 7A 1 2 1 3 Give the oxidation number of the nitrogen in the following molecules and ions Molecule Oxidation Number N2O NO NO2 N2O4 N2O5 NO2 1 NO3 1 1 2 4 4 5 3 5 1 0 5 N2 Total Charge 2 0 0 Individual Charge 1 Atom N2 O 2 2 2 2 2 2 N O 0 4 4 4 2 N O2 0 8 4 8 2 N2 O4 Total Charge 10 0 3 4 1 5 6 1 Individual Charge Atom 2 O5 3 2 N O2 5 2 N O3 4 Oxidation Numbers Worksheet KEY Oxidation Numbers Rules top of table takes priority F 1 1 or 2 1A or 2A H O Other 7A 1 2 1 4 Give the oxidation number of the phosphorus in the following molecules and ions Molecule Oxidation Number HPO3 H3PO2 H3PO3 H3PO4 H4P2O7 H5P3O10 5 1 3 5 5 5 1 1 Total Charge 5 6 0 3 1 4 0 3 3 6 0 Individual Charge 5 2 1 1 2 1 3 2 Atom H P O3 H3 P O2 H3 P O3 Total Charge 3 5 8 0 4 10 14 0 5 1 20 0 Individual Charge 1 5 2 Atom H3 P O4 1 H4 5 P2 2 O7 5 5 1 H5 2 P3 O10 5 Oxidation Numbers Worksheet KEY Oxidation Numbers Rules top of table takes priority F 1 1 or 2 1A or 2A H O Other 7A 1 2 1 3 3 5 4 0 ClF3 H3AsO3 SbF6 TiO2 P4 5 Give the oxidization number of the underlined atom in the following molecules and ions Molecule Oxidation Molecule Oxidation Molecule Oxidation Number Number Number 6 7 2 0 0 MoO4 2 MnO4 PtCl4 2 O2 O3 0 Cs2O PtCl6 2 CaI2 SnF2 Al2O3 1 4 2 2 3 Individual Charge Atom Total Charge 0 2 4 4 6 1 Pt Cl6 3 3 3 1 Cl F3 2 2 Ca 2 1 I2 3 3 1 3 6 2 0 H3 As O3 0 1 2 2 2 1 Sn F2 5 5 6 1 Sb F6 Total Charge 6 0 0 Individual Charge 3 Atom Al2 O3 Total Charge 4 0 6 8 2 7 8 1 2 4 2 Individual Charge 2 6 2 7 2 2 1 2 1 2 2 Cs2 O 6 2 4 4 6 Oxidation Numbers Worksheet KEY Oxidation Numbers Rules top of table takes priority F 1 1 or 2 1A or 2A H O Other 7A 1 2 1 Atom Ti O2 Mo O4 O4 Pt Cl4 M n 7