Balance the following equation by oxidation number method.
`KMnO_(4)+H_(2)SO_(4)+H_(2)C_(2)O_(4)toK_(2)SO_(4)+MnSO_(4)+CO_(2)+H_(2)O`

Explanation

To balance the equation \( KMnO_4 + H_2SO_4 + H_2C_2O_4 \rightarrow K_2SO_4 + MnSO_4 + CO_2 + H_2O \) using the oxidation number method, follow these steps:

### Step 1: Identify Oxidation States
- **Potassium (K)** in \( KMnO_4 \) and \( K_2SO_4 \) is +1.
- **Manganese (Mn)** in \( KMnO_4 \) is +7 and in \( MnSO_4 \) is +2.
- **Sulfur (S)** in \( H_2SO_4 \) and \( K_2SO_4 \) is +6 and in \( H_2SO_4 \) is +6.
- **Carbon (C)** in \( H_2C_2O_4 \) is +3 and in \( CO_2 \) is +4.
- **Oxygen (O)** is -2 in all compounds.
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