Flashcards
Getting Metals From Rocks #2
Flashcards do conjunto (9)
- 1Give an example of a metal that has to be extracted using electrolysis.Aluminium
- 2What is a negative about electrolysis, compared to reduction?It is much more expensive because it uses a lot of energy, e.g a high temperature is needed to melt aluminium oxide so that aluminium can be extracted
- 3What is wrong with copper gained by reduction?It is very impure, meaning it wont conduct electricity well, which is bad as conduction is one of the main uses of copper
- 4What is electrolysis?The breaking down of a substance using electricity
- 5What does electrolysis require?A liquid to conduct the electricity, called the electrolyte
- 6Often, what are electrolytes?Metal salt solutions, made from the ore. Or molten metal oxides
- 7What characteristics does the electrolyte have, that makes electrolysis work?Free electrons allow the conduction of electricity
- 8Which is the positive rod?Anode
- 9Which is the negative rod?Cathode