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Author	Topic: High school student needs help!
Guest unregistered	posted 01-23-2003 10:06 AM Hi, I'm a junior in high school looking for the most cost efficient, and simplest way to extract silver from 2.3 grams of iron, 2.3 grams of sulfur, and 2.3 grams of silver nitrate.... Please help!!! IP: Logged
FredZ Posts: 1070 Registered: Jun 99	posted 01-23-2003 08:58 PM It is always great to see an interest in chemistry.... You ask what is the least costly method of extracting silver from the following components. 2.3 grams of iron, 2.3 grams of sulfur, and 2.3 grams of silver nitrate. The processes required to precipitate the silver and then filter and disolve the percipitate, and the cost of the chemicals required are more effort and cost than the value of the silver in 2.3 grams of silver nitrate. Even if 1 gram of silver had been disolved to make the nitrate.... the value of 1 gram of silver is approximately $0.15. Alot of work for fifteen cents. I hope this answered your question. IP: Logged
Bob and Carol Carnighan Posts: 63 Registered: Apr 99	posted 01-23-2003 10:24 PM A piece of cake. The elemental iron and elemental sulfur are insoluble in water. Add water and the silver nitrate will go into solution. Filter out the iron and sulfur. To the clear solution, add a strip of copper or even a copper penny. The copper will go into solution displacing the silver which will precipitate out onto the copper as elemental metallic silver. You may want to use distilled or non-chlorinated water since any chlorine will precipitate out the silver as insoluble silver chloride. IP: Logged
FredZ Posts: 1070 Registered: Jun 99	posted 01-24-2003 04:34 AM Bob & Carol, You guys are great! That is a simple solution and a relatively easy way to extract any silver in the nitrate compound. Any idea what percentage of silver is in silver nitrate? Who is the chemist? IP: Logged
Bob and Carol Carnighan Posts: 63 Registered: Apr 99	posted 01-24-2003 02:22 PM Using whole numbers, the atomic weight of silver is 108. The molecular weight of silver nitrate (AgNO3) is 160. 108 divided by 160 times 100% is 68%. Dry crystalline silver nitrate is 68% silver by weight. IP: Logged
FredZ Posts: 1070 Registered: Jun 99	posted 01-24-2003 04:50 PM Wow! That is a great bit of info to know and well explained. It appears that our student may claim nearly a quarter a dollar if he can get the distilled water for free. Can he use a the paper filters used for coffee to filter out the insoluble elements? IP: Logged
Anuh Posts: 190 Registered: Jan 2003	posted 01-29-2003 07:37 PM quote: Originally posted by Guest: Hi, I'm a junior in high school looking for the most cost efficient, and simplist way to extract silver from 2.3 grams of iron, 2.3 grams of sulfur, and 2.3 grams of silver nitrate.... Please help!!! Not being a chemist, my first question is why there are equal quantities of iron, sulfur and silver nitrate? Anyone care to inform me? ------------------ Anuh IP: Logged
Anuh Posts: 190 Registered: Jan 2003	posted 01-30-2003 10:50 PM quote: Originally posted by Anuh: Not being a chemist, my first question is why there are equal quantities of iron, sulfur and silver nitrate? Anyone care to inform me? After re-reading all of this, my husband raised the question whether there is an easy method of removing the silver plating from silverplated objects. So, I thought I would throw that out and see who might have some input. ------------------ Anuh IP: Logged

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