Calculate the percentage of oxalate ion in a given sample of oxalate salt of which 0.6 g dissolved 100 " mL of " water required 90 " mL of " `(M)/(100)KMnO_(4)` for complete oxidation.

Explanation

To calculate the percentage of oxalate ion in the given sample of oxalate salt, follow these steps:

### Step 1: Determine the Molecular Weight of Oxalate Ion
The molecular formula for oxalate ion is \( C_2O_4^{2-} \).
- The atomic weight of Carbon (C) is approximately 12 g/mol.
- The atomic weight of Oxygen (O) is approximately 16 g/mol.

Calculating the molecular weight:
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