You can distinguish between different anions (ions with a negative charge) by using one of the test for anions. Below is a lists of tests and their results for various anions.

Anions Test Result
CO32- Hydrocloric Acid Carbon Dioxide given off
Cl- Nitric Acid + Silver Nitrate White Precipitate Formed
I- Nitric Acid + Silver Nitrate Bright Yellow Precipitate Formed
I- Lead Nitrate Yellow Precipitate Formed
NO3- Aluminium + Sodium Hydroxide Ammonia given off
SO42- Hydrocloric Acid + Barium Chloride White Precipitate Formed

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