I Figured out why the Coins look Different

I Figured out why the Coins look Different Remember the coin experiment that I performed lately? When I washed the coins, they looked different. But why? I finally figured out the answer. Copper metal is oxidized by the Ag1+ to Cu2+ and the Ag1+ ions are reduced by the copper metal to silver metal. But do you remember what the coins are made of? Penny: The alloy remained 95 percent copper and 5 percent zinc until 1982, when the composition was changed to 97.5 percent zinc and 2.5 percent copper (copper-plated zinc) until now. Cents of both compositions appeared in that year. 50 Satang (Thai baht): The core is 99% iron and cladding is 99% Copper. 10 Yen (Japanese Yen): 95% copper, 3–4% zinc, and 1–2% tin. The Penny turned yellow-orange because the zinc was mixed with copper. The Thai coin turned darker because of the iron. The Japanese coin turned yellow because of the zinc and tin. Tin is light yellow and zinc is gray. I hope you enjoyed that experiment, if you did, comment down below ↓ Sources: www.chem.indiana.edu/faculty…/5-5%20Silver%20Tree%20Redox%20Reaction.doc More sources at: The Silver Coin     Advertisements

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The Silver Coin

The Silver Coin What about this experiment? Remember the silver tree? That was a great experiment. Go over there and check it out (here: https://danupondrake.com/2017/06/25/the-silver-tree/). The silver nitrate will stick to the copper coil and make crystals. But instead of copper coils, why don’t we try copper coins? It will be fun to try! Let’s get started then! Let’s some […]

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The Silver Tree

The Silver Tree As said on my post (it finally came 2) the silver nitrate is only 10 grams and it’s about $20. 10 grams is a little amount and it is very expensive, so I hope I don’t make any mistakes. The classic silver tree demonstration! Very simple to set up and perform, it’s great to introduce kids to […]

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