Jars Cracking

[golddie]

Hi 4metals
How is the heating mantle used and why is it better than a pot of boiling water.
It looks like there is no water in the heating mantle
Is it more efficient than what I was saying and is it expensive
Thanks


http://www.google.ca/images?q=heating+mantle.&oe=utf-8&rls=org.mozilla:en-USfficial&client=firefox-a&um=1&ie=UTF-8&source=univ&sa=X&ei=_0t_Tc3RIuuI0QGrlbjrCA&ved=0CDsQsAQ&biw=1024&bih=578

 

[4metals]

Unless you have the rings to set different spherical vessels on in a steam or water bath it is difficult to support them, and when you're done you are handling wet glass. Mantles are fabric, no water, they grip the contour of the flask and the heat transfer is efficient. Mantles cost more than a hot water bath though, but they can get hotter than boiling water but you won't need that much heat.

 

[goldenchild]

Mantles are fabric, no water, they grip the contour of the flask and the heat transfer is efficient. Mantles cost more than a hot water bath though, but they can get hotter than boiling water but you won't need that much heat.

You'd also have to be extra cautious in not creating boilovers and managing effervescence.

 

[4metals]

You'd also have to be extra cautious in not creating boilovers and managing effervescence.

That is true no matter how you heat a reaction, using a watch glass and never filling a vessel more than half way for a reaction goes a long way to that end. That is true whether your lots are big or small.