Electrolysis of Aluminium Oxide - GCSE Chemistry | kayscience.com
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- Опубликовано: 3 янв 2025
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Electrolysis of Aluminium Oxide - GCSE Chemistry | kayscience.com
Aluminium oxide has a very high melting point of 2050°C. Cryolite is added to lower the melting point to 850°C to save running costs by lowering the heat and electricity required to keep the aluminium oxide molten. Aluminium forms at the cathode and oxygen forms at the anode. The electrodes are made of graphite (carbon). As they are very hot, the oxygen reacts with the carbon forming carbon dioxide. Over time the graphite electrodes burn away so regularly need to be replaced.
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At 6:25 you said “ they flow from the cathode back to the anode “ where it should’ve been the other way , right ?
Hi, thanks for the question, and in the context of electrolysis of molten aluminium oxide, electrons flow from the cathode to the cations, and then electrons flow from the anions to the anode. This cycle is repeated over and over. Hope that helps?
Beautifully explained. Thank you.
Glad it was helpful!
Very well explained!👍
Wow awesome teaching skills . impressive , I'm kind of jealous.. so clean and simple.
thank you and all you need is a steady hand!
you made it clear even my grade 2 learner can understand
at 8:27 the 3rd qt the formula is wrong bc the oxygen shud be 30 2 for it to be balanced not 6 as that would make it 12 right?
Thanks for the spot! Silly mistake, will be corrected 😊
great video!
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Thanks! Nice explanation
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Very good explanation
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Thanks
Welcome
what is the electrolyte?
the molten aluminium oxide is the electrolyte
Excellent
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Question 3 last answer not balance it should be 3 oxygen not 6