Restore Silver with Electrochemistry 2017

In this video we restore s silver metal coin with electrochemistry. Old silver is often tarnished by a thin layer of silver sulfide that appears as a brown color. The silver sulfide can be electrochemically converted back into pure silver if a negative potential is applied. To do this, first make a solution of 200mL water and 20g sodium chloride (salt) with 10g sodium bicarbonate (baking soda). They won't completely dissolve but this is acceptable. Then simply place a silver object in the solution and contact it with a large piece of aluminum foil. In a short time the silver will be restored. A very cool way to do the same thing is to use a battery. Connect the negative end of the battery to the silver and the positive end to a large electrode, like a copper plate, and dip them both in the solution. This process occurs due to electrochemical reduction of the silver sulfide to silver. Related videos: Restore silver by electrochemistry 2009: https://www.youtube.com/watch?v=vGCx9HZwYBo Donate to NurdRage! Through Patreon (preferred): https://www.patreon.com/NurdRage Through Bitcoin: 1NurdRAge7PNR4ULrbrpcYvc9RC4LDp9pS Glassware generously provided by http://www.alchemylabsupply.com/ Use the discount code "nurdrage" for a 5% discount. Social media links: Twitter: https://twitter.com/NurdRage Facebook: https://www.facebook.com/NurdRageYoutube/ Instagram: https://www.instagram.com/nurdrageyoutube/