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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 Al 3- 4 Al Oxidation: 6 O 2- 3 O2 ___________________________________________________________________________________ Redoxreaction:

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Page 1: 3a aluminium ab

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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