mattie2353
28.03.2021 •
Chemistry
Aluminium extraction from its ore
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Ответ:
The extraction is done by electrolysis. The ions in the aluminium oxide must be free to move so that electricity can pass through it. Aluminium oxide has a very high melting point (over 2000°C) so it would be expensive to melt it. Aluminium oxide does not dissolve in water, but it does dissolve in molten cryolite. This is an aluminium compound with a lower melting point than aluminium oxide. The use of cryolite reduces some of the energy costs involved in extracting aluminium.
Ответ:
1. Strontium 2. Technetium 3. Silver
Explanation: