Oxidation and reduction Flashcards
1
Q
whay does oxidation reactions sometimes do to metals?
A
corrode /rust
2
Q
State which method of extraction is most expensive?
A
Electrolysis bc high temperatures used to melt lots of electricity -expensive
3
Q
State one more method of extracting metal?
A
bio leaching-bacteria separates metals from ore
bacteria get energy from bonds between atoms in ore-separating metal from ore in process
leachate (solution produced)contains metal ions can be extracted by electrolysis
4
Q
Phytoextraction
A
Involves growing plants in soil that contains metal compounds.
Plants cant use or get rid of metal so it builds up in leaves
plants can be harvested ,dries and burned in furnace
ash has metal compounds which can be extracted by e or d methods
