If in solution containing `Cl^(-) & Br^(-)` ions, `AgNO_(3)` is added then initial precipitate of which colour will be formed ?

Answer

To determine the initial precipitate color formed when `AgNO3` is added to a solution containing `Cl^(-)` and `Br^(-)` ions, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Ions Present**:
The solution contains two anions: chloride ions (`Cl^(-)`) and bromide ions (`Br^(-)`).

2. **Add Silver Nitrate (`AgNO3`)**:
When `AgNO3` is added to the solution, it dissociates into `Ag^+` and `NO3^(-)` ions.

3. **Reactions with Chloride Ions**:
The `Ag^+` ions react with `Cl^(-)` ions to form silver chloride (`AgCl`):
\[ Ag^+ + Cl^- \rightarrow AgCl \]
Silver chloride is known to form a white precipitate.

4. **Reactions with Bromide Ions**:
The `Ag^+` ions also react with `Br^(-)` ions to form silver bromide (`AgBr`):
\[ Ag^+ + Br^- \rightarrow AgBr \]
Silver bromide forms a pale yellow precipitate.

5. **Determine the Initial Precipitate**:
Since `AgCl` (white precipitate) is formed first before `AgBr` (pale yellow precipitate), the initial precipitate upon the addition of `AgNO3` to the solution will be white due to the presence of chloride ions.

6. **Conclusion**:
Therefore, the initial precipitate formed when `AgNO3` is added to a solution containing both `Cl^(-)` and `Br^(-)` ions is white.

### Final Answer:
The initial precipitate formed is **white** (from `AgCl`).

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