rstar
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Preparing Mn salts from battery grade MnO2
Wel i've got dumps of MnO2 from batteries.
Wat salts can i make easily now ? I also hv some K2S2O5. Telll if it can be used in the processes 
"A tidy laboratory means a lazy chemist "
- Jöns Jacob Berzelius
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Bot0nist
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Have you searched the forum and youtube? What did you find?
See my signature...
U.T.F.S.E. and learn the joys of autodidacticism!
Don't judge each day only by the harvest you reap, but also by the seeds you sow.
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CrEaTiVePyroScience
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The MnO2 paste is probably mixed with zinc or ammonium chloride. Mix it with water and filter it off.
Please note that this MnO2 isn't very pure 
You could make MnSO4:
Mix 30grams of oxalic acid, 300mL of water, and 13mL of sulfuric acid. Then add the manganese dioxide continually until the solution stops bubbling.
[Edited on 10-10-2012 by CrEaTiVePyroScience]
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rstar
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can my K2S2O5 reduce MnO2 ?
"A tidy laboratory means a lazy chemist "
- Jöns Jacob Berzelius
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plante1999
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Make a solution of sodium bisulphate and one of sodium metabisulphite, in the bisulphate solution mix purified MnO2 and poor slowly with a lot of
stiring the sodium metabisulphite in. After addition wait an hour and filter the mix to get slightly pink colored solution. Precipitate the manganese
using sodium carbonate solution. Filter the manganese carbonate and dissolve it in HCl to get manganese chloride. Do not keep the manganese carbonate
since it turn quite readily to manganese dioxide.
[Edited on 11-10-2012 by plante1999]
I never asked for this.
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blogfast25
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Quote: Originally posted by plante1999  | Do not keep the manganese carbonate since it turn quite readily to manganese dioxide.
[Edited on 11-10-2012 by plante1999] |
Not true: it's quite stable and the wet precipitate can be dried w/o problems. It's commercially available too. MnCO3 is about as stable as MnCl2.
You may be confusing with Mn(OH)2: freshly precipitated that oxidises to MnO2 by air oxygen very quickly.
[Edited on 11-10-2012 by blogfast25]
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rstar
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well.... if i get the black mixture from a old, used up, battery ... can i still make Mn<sup>2+</sup> salts from that
"A tidy laboratory means a lazy chemist "
- Jöns Jacob Berzelius
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blogfast25
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| Quote: Originally posted by rstar | | well.... if i get the black mixture from a old, used up, battery ... can i still make Mn<sup>2+</sup> salts from that
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Yes, there are numerous methods and numerous threads about it here. UTSF.
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