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Author: Subject: AgNO3
thalium
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[*] posted on 2-11-2004 at 12:39
AgNO3


Do you have any idea from where I can get some? Consider that I'm in Europe and I'm 16 years old. Any ideas pls except racking from school.Thanks



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[*] posted on 2-11-2004 at 12:50


Do you have any nitric acid on hand? Then you could easily react silver form a jewelery with nitric acid to form silver nitrate. That's definetely the most easy, and probably the only way to get hold of silver nitrate. Buying it from a supplier is a no, no - costs an arm and a leg to buy only a small quantity of it, as much as 5g reagent grade might cost an approx 11.00 Euros where I live.



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garage chemist
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[*] posted on 2-11-2004 at 14:25


I always made my AgNO3 from silver and nitric acid. It takes quite a while to dissolve though (up to several days, depending on the form of your silver- if it has a large surface, it reacts faster), and you have to boil it. Use about 15- 25ml of 65% HNO3 for 8g silver. When all silver has dissolved, you have to boil it down in a big beaker. This liberates all the excess HNO3 as vapor, so do it OUTSIDE. Always stir the cristalline mass with a glass rod, and when it stops fuming and doesn't stick to the glass anymore, it is dry. Store it in a brown glass bottle.
Purchase the silver as "Feinsilber" from a jeweler and don't use something that seems to be made from silver! Nearly all silver in jewelery and cutlery is an alloy with copper.



[Edited on 3-11-2004 by garage chemist]
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thalium
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[*] posted on 2-11-2004 at 23:09


thanks..I have been thinking about the nitric acid thing and I'll try it (when I'll find some-next chem class that is):)



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[*] posted on 3-11-2004 at 05:37


Thalium, I posted here a description of my experience obtaining silve nitrate from acid and scrap silver some time ago, do a search.

I think you can also obtain a mixed solution of silver nitrate and sodium nitrate doing electrolisys using a parted cell, silver anode and sodium nitrate solution as electrolyte.

Edit: Does the last paragraph make any sense to you?

[Edited on 3-11-2004 by Tacho]
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thalium
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[*] posted on 3-11-2004 at 11:03


What last paragraph? The german thing? I don't know german:(... i knew about 2HNO3 + 2Ag ---> 2AgNO3 + H2 but I guess I was just too lazy to do it)



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[*] posted on 3-11-2004 at 13:09


Quote:
Originally posted by thalium
What last paragraph? The german thing?


No, sorry, I mean this: "electrolisys using a parted cell, silver anode and sodium nitrate solution as electrolyte".
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thalium
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[*] posted on 3-11-2004 at 13:12


Well, it doesn't make much sense to me, but i'll try to figure it out:)



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[*] posted on 3-11-2004 at 13:35


I suggest Bromic acid's e-book here.

[Edited on 3-11-2004 by Tacho]
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[*] posted on 3-11-2004 at 16:10


You mean electrolysis in a partitioned cell with a silver anode and NaNO3 solution as electrolyte.



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thalium
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[*] posted on 3-11-2004 at 23:11


this is what i was thinking about too...



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[*] posted on 4-11-2004 at 08:56


2HNO3 + 2Ag ---> 2AgNO3 + H2

This is wrong....

Take a look at redoxpotentials to know why...




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thalium
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[*] posted on 4-11-2004 at 10:58


I just ballanced it.... I'll learn redoxpotentials next week... damn:(



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[*] posted on 12-1-2006 at 15:19
mossy silver


I wanted to make some silver nitrate (AgNO3) from some silver coin-like mintings (0.999+ pure). Following the method of Ammen in his book Recovery and Refining of Precious Metals I first melted down the mintings (1.5 troy oz) in my muffle furnace. I then dribbled this into a 5-gal bucket filled with cold water to produce mossy silver. Attached is a picture of the product:

[Edited on 12-1-2006 by Magpie]

[Edited on 30-1-2007 by chemoleo]

mossy.jpg - 65kB




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[*] posted on 12-1-2006 at 17:49
Silver Nitrate


Thalium, nitric acid may be harder to obtain than silver nitrate depending on where
you live. If you do go the route of buying a small amount then I suggest a photographer's
supply shop. Prices may be cheaper than a chemical company. From the prices I've
seen it's not cheap in any case.




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[*] posted on 30-5-2006 at 05:29


Can I use 10% to 20% HNO3 to make AgNO3 or do I need a higher concentration?
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[*] posted on 30-5-2006 at 13:13


Low concentrations are fine as long as the acid is hot. I made my silver nitrate from 13% junk I had lying around. :D



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