1. Color:
* AgCl: White precipitate.
* AgI: Pale yellow precipitate.
2. Solubility in Ammonia Solution:
* AgCl: Soluble in concentrated ammonia solution, forming a colorless solution of the diamminesilver(I) ion, [Ag(NH₃)₂]⁺.
* AgI: Insoluble in concentrated ammonia solution.
3. Exposure to Light:
* AgCl: Darkens upon exposure to light due to photodecomposition.
* AgI: Also darkens upon exposure to light, but at a slower rate than AgCl.
In summary:
* If the precipitate is white and soluble in concentrated ammonia, it's likely silver chloride (AgCl).
* If the precipitate is pale yellow and insoluble in concentrated ammonia, it's likely silver iodide (AgI).
Important Notes:
* The color difference can be subtle, especially for small amounts of precipitate.
* Always perform these tests in a well-ventilated area, as ammonia is a strong irritant.
* It's crucial to handle silver salts with care, as they can be toxic.
Let me know if you have any other questions.
