Chapter 5, Problem 119RQ

As described in the Chemistry Outside the Classroom 5.1, silver tarnishes in the presence of hydrogen sulfide to form ${\text{Ag}}_{\text{2}}\text{S}$, which is how silver spoons tarnish. The silver can be polished and made lustrous again by placing the piece of tarnished silver in a pan with aluminum foil and detergent solution. The silver must touch the aluminum foil. Write balanced equations for both the tarnishing and the polishing of silver.