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Question
Balance the following equation by the oxidation number method.
\[\ce{KMnO4 + H2C2O4 + H2SO4 -> K2SO4 + MnSO4 + CO2 + H2O}\]
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Solution
\[\ce{2KMnO4 + 5H2C2O4 + H2SO4 -> K2SO4 + MnSO4 + CO2 + H2O}\]
\[\ce{2KMnO4 + 5H2C2O4 + H2SO4 -> K2SO4 + 2MnSO4 + 10CO2 + H2O}\]
\[\ce{2KMnO4 + 5H2C2O4 + 3H2SO4 -> K2SO4 + 2MnSO4 + 10CO2 + 8H2O}\]
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