Download Worksheet: Oxidation Numbers

Worksheet: Oxidation Numbers
Name___________________
1. Give the oxidation numbers of all the elements in the following molecules and
ions:
a. SO,
SO2,
SO32-,
SO3,
SO42-
S=+2 O=-2 S=+4 O=-2 S=+6 O=-2 S=+4 O=-2 S=+6
b. ClO2,
ClO-,
ClO2-,
c. N2O,
NO,
NO2,
ClO3-,
ClO4-
N2O4,
N2O5,
NO2-,
NO3-
2. Determine the oxidation number of the sulfur atom:
a. H2S
b. S
d. S2-
c. H2SO4
e. HS-
f. SO2
g. SO3
3. Indicate the oxidation number of phosphorus in each of the following
compounds:
+5
_____
a. HPO3
+5
_____
d. H3PO4
b. H3PO2
+1
_____
+5
e. H4P2O7 _____
c. H3PO3
+3
_____
+5
f. H5P3O10 _____
4. Give oxidation numbers for the underlined atoms in these molecules and ions:
k.
MoO42- +6
H3AsO3 +3
l.
MnO4- +7
h.
SbF6- +5
m.
PtCl42-
SnF2 +2
i.
TiO2 +4
n.
O2
0
Al2O3 +3
j.
o.
O3
0
a.
Cs2O +1
f.
ClF3
b.
PtCl62- +4
g.
c.
CaI2 +2
d.
e.
+3
P4 0
CHEMISTRY: A Study of Matter
© 2004, GPB
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