Electrolysis of Aluminium Oxide

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First person to... correctly identify the conditions required for electrolysis of aluminium oxide into pure aluminium. 20 pts first correct answer. 10pts for second. 5 pts for third.

Next... first person to correctly explain the theory behind electrolysis. Use of key words is crucial. 20 pts, 10 and 5 awarded as before.

Posted: 20-11-09 16:11 by Mike McNicholas

for the first one is it were the molton cryolite contains aliminium oxide and the cathodes are carbon, while the molton aliminium is collected at the bottom of the whereever its taken place

the theory behind electrolysis came from a man named 'faraday', says somat like the use of electricity is used to seperate metals from one substance and attach onto a cathode by using the current and magnetic fields...

Posted: 29-11-09 12:54 by Mattie Patefield

Molten Al2O3; cryolite -s the correct ore name; carbon cathode; electricity required to split molten compound.

20 points to Matthew.

Posted: 29-11-09 18:26 by Mike McNicholas

1. where molton cryolite has aliminium oxide in it and the cathode is a carbon. molten aliminium is made where it took place.

Posted: 01-12-09 16:51 by sean cresswell

Theory Of Electrolysis was by a man called faraday Electrolysis it is the passage of an eletric current through an ionic substance that is either molten or dissolved in a suitable solvent, resulting in chemical reactions at the electrodes and separation of materials.

Posted: 01-12-09 18:20 by Rochelle Davico

for the first question Aluminium is to high for the reactivity series so you cart use carbon reduction. The ore is converted pure aluminium oxide by the Bayer Process and this is then electrolysed in solution in molten cryolite.

Posted: 01-12-09 18:29 by jayne silverwood

Umm... You need two electrodes, the cathode, being attached to the positive charge of a power pack, would need to be carbon. However the anode, which will be attached to the negative charge of the power pack, will be carbon as well. Within the cryolite, there is aluminium, this is going to be the aluminium that is going to be extracted. Then as the experiment takes place, the cryolite will disperse alumium at the bottom of the area where the experiment is taking place.

The answer to the second question is; that if you have a liquid containing mobile ions and you have two electrodes containing the same element, you are able to transfer the ions from the electrolyte to one of the electrodes through magnetism.

But I don't understand the aluminium one. I think it's different to what we did in class.

Posted: 01-12-09 18:53 by Jac Bates

There would be two electrodes one would be the anode and the other one would be the cathode. The cathode would be attached to the positive charge and the anode to the negative. The source of the Aluminium would be the molten cyrolite there.

Posted: 02-12-09 12:47 by Chirag Gulabchande

cryolite has alluminium oxide innit and the cathodes are ca chemical decomposition reaction produced by passing an electric current through a solution containing ions removing superfluous or unwanted hair by passing an electric current through the hair root
arbon . something like that anywayyz

Posted: 02-12-09 16:07 by connor harper

The ore is converted into pure aluminum by the bayer process and this is electrolysed in solution in molten cryolite which is another aluminum compound.The aluminium oxide has too high a melting point to electrolyse on its own.

electrolysis is a method of using an electrical current to drive an otherwise non-spontaneous chemical reaction.Electrolysis is commercially highly important as a stage in the separation of elements from naturally-occurring sources such as ores using an elctrolytic cell.

Posted: 02-12-09 16:25 by alex succoi

The ore is first converted into pure aluminium oxide by the Bayer Process, and this is then electrolysed in solution in molten cryolite - another aluminium compound. The aluminium oxide has too high a melting point to electrolyse on its own.

this is what i found out. but its very confusing in words.

ALEX SUCCOI you copied ME! loser..

Posted: 02-12-09 16:46 by Anjulie Baidya

is it were you have two electrodes in a solution of aluminium oxide and you increase the voltage that is going through the two elcetrodes which extracts the pure aluminium from the aluminium oxide

Posted: 02-12-09 16:53 by zane sweeney

The aliminium oxide is lined with graphite which acts as a cathode and anodes. The aliminium then dissolves into molten cryolite, electricity is passed through and electrolysis begins.

Electrolysis is the method of using an electrical current to drive a chemical reaction and the seperation of materials. This theory was by a man called faraday.

Posted: 02-12-09 17:23 by Holly Smith

molton cryolite has aluminium oxide theres 2 wires where electolysis hppenes and then the molten aluminium is extracted the bottom

English chemist and physicist Michael Faraday, who developed the field theory of electromagnetism and electrolysis

Posted: 02-12-09 17:26 by Melandri Nyandoro

Q1: Molton cryolite has aluminium oxide in it which is extracted, both cathodes are carbon but one is positively charged and one negatively charged. the molten cryolite then releases and diperses the aluminium at the bottom of the place where the experiment has taken place.

Q2: The theory of electrolysis was developed by a scientist named Michael Faraday who reported that the quantity of elements separated by passing an electrical current through a molten or dissolved salt is proportional to the quantity of electric charge passed through the circuit. This became the basis of the first law of electrolysis: M = K . Q

Second Law: Faraday also discovered that the mass of the resulting separated elements is directly proportional to the atomic masses of the elements when an appropriate integral divisor is applied. This provided strong evidence that discrete particles of matter exist as parts of the atoms of elements.

Posted: 02-12-09 17:37 by jack bourke

the hwk is now closed.

no more opportunities.

Posted: 02-12-09 23:47 by Mike McNicholas