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WorksheetsOXIDATION NUMBERS AND REDOX REACTIONS
Total questions: 20
Worksheet time: 5hrs 0mins
What is the oxidation state of chromium in the compound CaCr2O7?
(a)
What is the oxidation state of zinc in the compound Zn(OH)42-?
(a)
Cr2O72-?
What is the oxidation state of Cl in ClO- ?
0
+1
-1
+2
What is the oxidation state of Pb in PbO ?
+2
+4
0
-2
C in CO32-?
-4
+2
0
+4
S in HSO4- ?
+5
-6
+6
+2
What type of reaction is this: C2H2 becomes C2H6
Reduction
Oxidation
Neither
Combustion
What type of reaction is this: SF4 becomes SF6
Hydrogenation
Reduction
Oxidation
None of the above
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:
Balance the following ACIDIC reactions using the half-reaction method.
MnO4−(aq) + H+(aq) + I− (aq) → Mn2+(aq) + I2(s)
Water is a product of this reaction. What is the coefficient of water in the final balanced equation?
8
5
2
16
WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:
Balance the following reactions using the half-reaction method.
MnO4−(aq) + H+(aq) + I− (aq) → Mn2+(aq) + I2(s)
How many electrons did you cross out on both side?
1 e-
2 e-
5 e-
10 e-
WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:
Consider the following REDOX reaction:
Cl2(g) → ClO−(aq) + Cl−(aq) (basic solution)
How many OH- molecules did you add to the reactant side of this reaction when balancing?
1
2
3
4
