Stream South Park Quicktime

container is lined with aluminum foil and pour a solution of warm water and salt, silver plunges few minutes y. .. already.

Silver, over time, react with compounds containing sulfur and Black, it is coated with a layer of silver sulfide, Ags.
redox reaction (oxidation reduction) that occurs is:

3 Ag2S + 2 Al + 6 H2O -> 6 Ag + 2 Al (OH) 3 + 3 H2S

The oxidized silver is reduced to metallic silver , and aluminum is oxidized, hydrogen sulfide is clear (you'll notice a smell of boiled eggs ...). Hot water and salt accelerates the electron transfer process and the chloride ions from salt attack surface protective layer of aluminum, allowing the silver to react more easily.
works.