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Topic: What is the chemical difference between light and heavy magnesium carbonate?  (Read 16935 times)

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JWP

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What is the chemical difference between light and heavy magnesium carbonate?
« Last Edit: February 06, 2006, 09:21:29 PM by Mitch »

Offline Mitch

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Re:Magnesium carbonate
« Reply #1 on: February 06, 2006, 09:21:17 PM »
light and heavy being defined as what?
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Offline mike

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I didn't think there was a chemical difference. I thought one was just denser (ie a finer grade and therefore more tightly packed) than the other ???

I could be wrong.... :-\
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Offline Morphic flip

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it`s the same with sodium carbonate, bulk density`s are different.
light - normally higher purity as well.
normal grade is more granular.

Offline asmaaalseedaraa

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What is the chemical difference between light and heavy magnesium carbonate?

the difference is just restracted in chemical structure which the light magnesium carbonate has 3 of H2O in it and 4 of H2O for  a heavy.

Offline UnintentionalChaos

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I think that this refers to the method of preparation and resulting composition. A soluble magnesium salt added to a cold carbonate solution affords a voluminous product of basic magnesium carbonate (a poorly defined mixture of magnesium carbonate and magnesium hydroxide). A hot or boiling carbonate solution, or preferably a bicarbonate solution, yields much more pure magnesium carbonate as a precipitate which settles rapidly from the solution, hence "heavy." I remember this discussion from somewhere...I wouldn't quote me on this though...

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