How can nitrite ion be distinguished from nitrate ion?

Explanation

To distinguish between nitrite ion (NO2-) and nitrate ion (NO3-), we can follow these steps:

### Step 1: Understanding the Ions
- **Nitrite Ion (NO2-)**: This ion has one nitrogen atom bonded to two oxygen atoms.
- **Nitrate Ion (NO3-)**: This ion has one nitrogen atom bonded to three oxygen atoms.

### Step 2: Conducting the Test
1. **Prepare the Sample**: Take a sample that may contain either nitrite or nitrate ions.
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