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Chemistry Help HERE ONLY !!
Mastermind:
Can someone give me a brief explanation on the Extraction of Aluminium?
I always get confused
Mastermind:
--- Quote from: LilWayne on May 28, 2009, 02:09:50 pm ---May/Jun 2008 //Q6)c)(ii)
another Question since no one is askin anything
Pasteur said that fermentation was respiration in the absence of air. Suggest a
definition of respiration.[2]
--- End quote ---
Thats easy, respiration is the release of energy using oxygen & glucose to give CO2 + water + energy
By the way, lil wayne sucks! =P
unknown 101:
--- Quote from: Mastermind on May 28, 2009, 03:08:24 pm ---Can someone give me a brief explanation on the Extraction of Aluminium?
I always get confused
--- End quote ---
aluminium is extracted by electrolysis, it is extracted from its orebauxite (Al2O3). and since pure aluminiumoxide melts at 2000 degree C, they add molten cryolite, which lowers the melting point to about 950, thus reducing costs, aluminium is produced at the cathode (Al3+ + 3e- goes to Al) and at the cathode (2O2- - 4e- goes to O2) a, also carbon dioxide may be produced when it reacts with the carbon electrode
Mastermind:
--- Quote from: LilWayne on May 28, 2009, 03:17:29 pm ---
--- Quote from: Mastermind on May 28, 2009, 03:08:24 pm ---Can someone give me a brief explanation on the Extraction of Aluminium?
I always get confused
--- End quote ---
aluminium is extracted by electrolysis, it is extracted from its orebauxite (Al2O3). and since pure aluminiumoxide melts at 2000 degree C, they add molten cryolite, which lowers the melting point to about 950, thus reducing costs, aluminium is produced at the cathode (Al3+ + 3e- goes to Al) and at the cathode (2O2- - 4e- goes to O2) a, also carbon dioxide may be produced when it reacts with the carbon electrode
--- End quote ---
Ah Thanks man, always got confused with the cryolite
& Carbondioxide is produce because the oxygen reacts with the carbon rod, which is why it needs to be replaced constantly
unknown 101:
u may get 1 mark
cuz u have to say the release of energy by living cells from food
and By the way LIL WAYNE IS THE BEST RAPPER ALIVE , so stop hating
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