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6 The graphite anodes have to be replaced regularly. Why is this? 7 Why is it so much more cost-effective to recycle aluminium than to extract new aluminium?

6 The graphite anodes have to be replaced regularly. Why is this? 7 Why is it so much more cost-effective to recycle aluminium than to extract new aluminium?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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The extraction of aluminium The diagram shows the electrolysis of alumina (aluminium oxide) purified from bauxite. graphte anodes graphite Inng (cahode) dc apply sold crust krming on minture aluminium oide dsobed hayolte moten aluminium 3 a What is the formula for aluminium oxide? b What ions are present in aluminium oxide? c What is the purpose of the cryolite in the process? 4 Write down half-equations for the processes occurring during electrolysis at: a the anode: . b the cathode: 5 Complete the two statements. a Oxidation (. b Reduction (. 6 The graphite anodes have to be replaced regularly. Why is this? 7 Why is it so much more cost-effective to recycle aluminium than to extract new aluminium? - of electrons) occurs at the. ... of electrons) occurs at the .
Transcribed Image Text:The extraction of aluminium The diagram shows the electrolysis of alumina (aluminium oxide) purified from bauxite. graphte anodes graphite Inng (cahode) dc apply sold crust krming on minture aluminium oide dsobed hayolte moten aluminium 3 a What is the formula for aluminium oxide? b What ions are present in aluminium oxide? c What is the purpose of the cryolite in the process? 4 Write down half-equations for the processes occurring during electrolysis at: a the anode: . b the cathode: 5 Complete the two statements. a Oxidation (. b Reduction (. 6 The graphite anodes have to be replaced regularly. Why is this? 7 Why is it so much more cost-effective to recycle aluminium than to extract new aluminium? - of electrons) occurs at the. ... of electrons) occurs at the .
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