Lead Acetate Paper

It is mainly used to test the existence of hydrogen sulfide gas. Lead acetate test paper with wetting lead to lead sulfide when it meets hydrogen sulfide gas. The white test paper becomes black at once. The chemical equation is: Pb (CH3COO) 2 + H 2 s = Pb S + 2CH3COOH
The instruction of lead acetate test paper:
Lead acetate test paper is very sensitive to hydrogen sulfide. The test paper must be kept in a sealed, clean wide reagent bottle. Use clean tweezers when used. When test paper is wetted, it should be suspended immediately in a container that holds hydrogen sulfide gas.