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Topic: Chromium from old audio tape  (Read 5908 times)

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Offline science2000

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Chromium from old audio tape
« on: December 25, 2005, 12:02:13 AM »
Does anyone know of a way I can dissolve the Chromium from it? Vinegar and peroxide aren't promising.
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Offline Alberto_Kravina

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Re:Chromium from old audio tape
« Reply #1 on: December 25, 2005, 01:42:02 PM »
concentrated HNO3 will dissolve the chromium, but I think that it also dissolves the tape...
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Offline P-man

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Re:Chromium from old audio tape
« Reply #2 on: December 29, 2005, 07:36:08 PM »
Yeah but if he's trying to get the chromium he won't really care about the tape, will he?
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Offline Alberto_Kravina

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Re:Chromium from old audio tape
« Reply #3 on: December 30, 2005, 02:52:17 PM »
I tried it by myself with 65% nitric acid and it worked, it also worked with 7 M HNO3.
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Offline science2000

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Re:Chromium from old audio tape
« Reply #4 on: December 30, 2005, 09:59:29 PM »
Unfortunately I don't have any nitric acid. concebtrated Hydrochloric acid doesn't seem to work. What's up with that! It's strange that this CrO2 is so inert.
« Last Edit: December 30, 2005, 10:05:05 PM by science2000 »
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Offline constant thinker

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Re:Chromium from old audio tape
« Reply #5 on: December 30, 2005, 10:56:28 PM »
Try out concentrated sulfuric acid. It's much for readily available than nitric acid. It may work or it may not. If it doesn't work then you'll have some sulfuric acid to play around with.
« Last Edit: December 30, 2005, 10:57:03 PM by constant thinker »
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