2.0 g sample of NaCN is dissolved in 50 " mL of " 0.3 M mild alkaline `KMnO_(4)` and heated strongly to convert all the `CN^(ɵ)` to `OCN^(ɵ)`. The solution after acidification with `H_(2)SO_(4)` requries 500 " mL of " 0.05 M `FeSO_(4)` Calculate the percentage purity of NaCN in the sample.

Explanation

To calculate the percentage purity of NaCN in the sample, we will follow these steps:

### Step 1: Determine the moles of KMnO4 used
Given:
- Volume of KMnO4 = 50 mL = 0.050 L
- Molarity of KMnO4 = 0.3 M

Using the formula:
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