Question

on a solid mixture, X. The inferences made are recorded in Table 2. Complete Table 2 by filling in the observations based on the inferences made. TABLE 2: TESTS ON MIXTURE X Test Observation Inferences a) Distilled water was added to a portion of X and the resulting mixture stirred and filtered. (The residue was set aside for use later.) The filtrate was divided into 3 equal portions and tests (b) to (d) done on separate portions. Cl- ions are present. b) Dilute nitric acid followed by a few drops of silver nitrate solution was added. Ammonium hydroxide solution was added to the resulting mixture. (3 marks)

Answer 1

Answer:

a) Upon adding silver nitrate, a white precipitate is observed

b) Upon adding ammonium hydroxide, the white precipitate dissolves to give a clear, colorless solution

Explanation:

Here, we want to state the observations when testing for chloride ions

From what we have:

a) When silver nitrate is added, a white precipitate is formed

This is as a result of the following chemical reaction:

$Ag\placeholder{⬚}_{(aq)}^+\text{ + Cl}_{(aq)}^-\text{ }\rightarrow\text{ AgCl}_{(s)}$

The AgCl is the white precipitate formed

b) Upon the addition of the ammonium hydroxide solution, a colorless and clear solution is observed showing that the white precipitate has dissolved