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WorksheetsWeek 7: Balancing REDOX reactions
Total questions: 14
Worksheet time: 29mins
What is the oxidation number of oxygen in water?
-1
-2
0
+1
+2
2CaO--> 2Ca + O2
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
which element, if any, is oxidized?
4Fe + 3O2 --> 2Fe2O3
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
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)
Which species is the result of oxidation?
Cl−
ClO−
