Question

How do silver halides work?

Answer 1

`Ag^(+) + X^(-) rarr AgX(s)darr`

Explanation:

Well, when they form they precipitate out of solution with alacrity. `AgCl` is curdy white, `AgBr` is creamy yellow. `AgI` is bright yellow. These salts are photoactive (in fact they were used in early photography) so that upon standing, reduction to elemental silver (as dark spots) occurs.