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Work-
sheet
The extraction of aluminium
? Blickpunkt Chemie, 1996 Schroedel, Schulbuchverlag GmbH, Hannover
1. Please fill in the correct terms.
2. From which raw material is aluminium extracted?
___________________________________________________________________________________
3. Why is cryolite added to the melt?
___________________________________________________________________________________
4. Which dangerous chemical by-product emerges from the addition of cryolite in an electrolysis?
___________________________________________________________________________________
5. Please complete following equations.
Reduction: 4 Al3- ? 4 Al
Oxidation: 6 O2- ? 3 O2
___________________________________________________________________________________
Redoxreaction:

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3a aluminium ab

  • 1. Work- sheet The extraction of aluminium ? Blickpunkt Chemie, 1996 Schroedel, Schulbuchverlag GmbH, Hannover 1. Please fill in the correct terms. 2. From which raw material is aluminium extracted? ___________________________________________________________________________________ 3. Why is cryolite added to the melt? ___________________________________________________________________________________ 4. Which dangerous chemical by-product emerges from the addition of cryolite in an electrolysis? ___________________________________________________________________________________ 5. Please complete following equations. Reduction: 4 Al3- ? 4 Al Oxidation: 6 O2- ? 3 O2 ___________________________________________________________________________________ Redoxreaction: