Wednesday 15 August 2012


I got a question about aluminum- tough AP chemistry problem...?

The Hall-Héraoult process for the electrolysis of aluminum oxide uses the mineral substance, cryolite (Na3AlF6), which of the following is not a reason for using cryolite?
a. Aluminum oxide dissolves in molten cryolite.
b. Molten cryolite is able to conduct an electrical current.
c. The aluminum in cryolite serves a a nucleation site for the reduction reaction.
d. Cryolite melts at a much lower temperature than aluminum oxide, thus lowering the energy costs of the reduction process.

Best Answer - Chosen by Voters

c

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