Question

Name the salt used in photography. Write its chemical formula and color.

Answer 1

Salt used in photography:

• The salt that is used in photography is Silver bromide and the chemical formula of Silver bromide is $\mathbf{AgBr}$.
• Silver bromide is a light-sensitive salt, when silver bromide is exposed to light it will decompose to metallic silver and bromine.

$\underset{\mathrm{Silver}\mathrm{bromide}}{2\mathrm{AgBr}}\stackrel{\mathrm{Sunlight}}{\to }\underset{\mathrm{Silver}}{2\mathrm{Ag}}+\underset{\mathrm{Bromine}}{{\mathrm{Br}}_2}$

• The color of Silver bromide salt is Pale-yellow.