Iron Sulphide Residues
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JanetW
- Posts: 4
- Joined: 08 May 2012, 13:03
- Job Title: Lab. Assistant
- School: Wollongbar TAFE
- Suburb: Wollongbar
- State/Location: NSW
Iron Sulphide Residues
Has anyone got any tips for cleaning iron sulphide residues out of test tubes??
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Graham Kemp
- Posts: 173
- Joined: 22 Nov 2011, 09:21
- Job Title: Laboratory Assistant
- School: St John's School
- Suburb: Roma
- State/Location: QLD
Re: Iron Sulphide Residues
Main tip: Do not use acid!
FeS + 2 HCl = FeCl2 + H2S (g)
Try a potassium permanganate wash.
3 FeS + 8 KMnO4 + 4 H2O = 3 FeSO4 + 8 MnO2 + 8 KOH
FeS + 2 HCl = FeCl2 + H2S (g)
Try a potassium permanganate wash.
3 FeS + 8 KMnO4 + 4 H2O = 3 FeSO4 + 8 MnO2 + 8 KOH
Re: Iron Sulphide Residues
Hammer - the only way! 
Based on the formula: stress x cost of cleaning agent x time taken to clean tubes versus cost of new test tubes = hammer
Based on the formula: stress x cost of cleaning agent x time taken to clean tubes versus cost of new test tubes = hammer
Cheers, K
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Lyn
- Posts: 706
- Joined: 16 May 2006, 10:00
- Job Title: Lab Assistant (Technician)
- School: St. John's Catholic College
- Suburb: Darwin
- State/Location: NT
Re: Iron Sulphide Residues
Thank you Smiley for making me laugh. You just brightened my morning. I just love a practical girl. 
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JanetW
- Posts: 4
- Joined: 08 May 2012, 13:03
- Job Title: Lab. Assistant
- School: Wollongbar TAFE
- Suburb: Wollongbar
- State/Location: NSW
Re: Iron Sulphide Residues
Thanks for your replies. Yes the hammer formula sounds good. However will try the potassium permanganate wash.
