Question

Question #850fd

Answer 1

`("CH"_3"COO")_2"Pb" + "H"_2"S" → "PbS" + "2CH"_3"COOH"`

Explanation:

The test paper is impregnated with lead acetate.

Hydrogen sulfide reacts with the lead acetate to form lead sulfide, which is black.

The equation for the reaction is

`underbrace(("CH"_3"COO")_2"Pb")_color(red)("lead acetate") + "H"_2"S" → underbrace("PbS")_color(red)("black") + underbrace("2CH"_3"COOH")_color(red)("acetic acid")`