Why does the white precipitate of silver halide become coloured in the presence of dye eosin?

Explanation

To understand why the white precipitate of silver halide becomes colored in the presence of the dye eosin, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding Silver Halides**:
Silver halides (like AgCl, AgBr, and AgI) are typically white precipitates. They are formed when silver ions react with halide ions (Cl⁻, Br⁻, I⁻).

2. **Introduction of Eosin**:
...