Student Worksheet
LSM 9.1-3
Oxidation Numbers, Extra Exercises
1. Assign oxidation numbers to chlorine in each of the following chemicals.
HCl(aq)>
C*2(g)> NaCl°(s)>
Cl(aq)’
HC^°3(aq)>
^°3?aq)>
KC^°2(s)>
C102(g)> HC104(aq)
2. Assign oxidation numbers to manganese in each of the following chemicals.
Mn02(s), KMn04(s)) Mn(s)) Mn04^q), MnCl2(s), Mn207(s)) Mn£q)
For the following reaction equations, use oxidation numbers to identify the oxida­
tion (the atom oxidized) and the reduction (the atom reduced).
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3. As03(aq)
+
I0&
4. CuO(s)
+
NH3(g)
5. Mn04~q) +
H2Se(g)
6.Pb02(s)
Pb(s)
+
->
+
As°4(aq)
I (aq)
N2(g)
+
+
H+q)
-»
Se(s)
+
H2S04(aq)
->
H20(1)
+
+
Cu(s)
Mn^
+
PbS04(s)
+
H20(1)
H20(1)
Chapter 9 Electric Cells 293