Pop Quiz ­ Redox
1. Indicate the oxidation number of the following.
___ N in HNO2
___ P in P2O52___ S in K2S2O8
___ B in B4O72-
2.
___ P in Ca5(P3O10)2
___ I in KIO3
Determine the species oxidized, reduced, the oxidizing agent and the reducing agent.
Mg
+
Al3+
è
Mg2+
+
Al
H2O2 + MnO4- è O2 + Mn2+
3.
Balance the following reactions using the half-reaction method. If the equation is not
already in ionic form, first write it in ionic form.
a)
HCl + HNO3 è HClO + NO
b)
H3PO3
+
NO3-
è
PO43-
+
N2O4
1
Pop Quiz ­ Redox
1. Indicate the oxidation number of the following.
2.
___ N in HNO2
___ P in P2O52-
___ P in Ca5(P3O10)2
___ S in K2S2O8
___ B in B4O72-
___ I in KIO3
Determine the species oxidized, reduced, the oxidizing agent and the reducing agent.
Mg
+
oxidized
Al3+
è
______
ox. agent ______
Mg2+
+
Al
reduced
______
red. agent ______
H2O2 + MnO4- è O2 + Mn2+
oxidized
______
ox. agent ______
reduced
______
red. agent ______
2
3.
Balance the following reactions using the half-reaction method. If the equation is not
already in ionic form, first write it in ionic form.
a)
HCl + HNO3 è HClO + NO
3
b)
H3PO3
+
NO3-
è
PO43-
+
N2 O4
4
5