Question

dentify some other substances (besides KCl) that might give a positive test for chloride upon addition of AgNO3. do you think it is reasonable to exclude these types of substances as contaminants that would give a false positive when you tested your reaction residue to verify that it is KCl

Answer 1

1. presence of either chloride, bromide, or iodide.

2. it is important to separate them to avoid contamination. Nevertheless, the substances have different colors when their salt precipitate is formed.

Step-by-step explanation:

The precipitate formed by the addition of silver nitrate indicates the presence of either chloride, bromide, or iodide. Although the colors are different (AgCl white, AgBr cream, AgI yellow), they are difficult to distinguish and a specific ion test is needed to determine which one is present.

Silver nitrate (AgNO3) reacts with potassium chloride (KCl) and a white precipitate is formed.