making a compound
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making a compound
Help. We have been burning Magnesium ribbon in a crucible for years to make a compound but the last few years we have had trouble getting in to burn. We had it going for 2 hours and only 1 worked. Any hints?
- Labbie
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Re: making a compound
Perhaps the Magnesium ribbon, has a coating on it? We would get the students to clean it with steel wool.
Regards Labbie
Lab Manager/Lab Tech, mind reading etc etc
Now retired
Lab Manager/Lab Tech, mind reading etc etc
Now retired
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Re: making a compound
If its black stuff ,I remove it by pulling a length through folded sand paper . A couple of pulls and its gone .
Probably stating the obvious , but when you heat it in the crucible , the lid should be on . Then when you lift the lid ( with tongs) , it lets in fresh oxygen and bursts into flames .
Also , I'm not sure if this is a problem for you ,but I always try to clean the crucibles after use by soaking them in HCl to remove the crud that forms in the bottom .
Probably stating the obvious , but when you heat it in the crucible , the lid should be on . Then when you lift the lid ( with tongs) , it lets in fresh oxygen and bursts into flames .
Also , I'm not sure if this is a problem for you ,but I always try to clean the crucibles after use by soaking them in HCl to remove the crud that forms in the bottom .
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- Posts: 511
- Joined: 15 Aug 2011, 10:48
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- School: NDSC
- Suburb: west gippsland
- State/Location: VIC
Re: making a compound
Thanks. It never used to be a problem, so although we clean the Mg I will get them to clean it 100% and I put out new crucibles but still didn't get a powder but a couple at least burnt the Mg a fair bit and got a slight weight increase.