Flashcards
Chemistry-obtaining and using metals
Flashcards do conjunto (13)
- 1oxidation is the ____ of oxygengain
- 2Reduction is the ____ of oxygenloss
- 3what is a displacement reaction?were a higher reactive metal replaces a lower reactivity metal in a solution of its salt
- 4how is gold ore found,why?native, that unreactive that it doesn't react with any other metal
- 5what is bio leaching?using bacteria to extract metals as it breaks the weak bonds
- 6what is phytoextraction?using plants to extract low grade ores through their roots, then burning them to release the carbon leaving the impure ore
- 7what is an advantage and disadvantage of bio leaching?cheaper, as it requires less specialists than traditional methods
economical: very slow compared to smelting therefore less cash inflow
environmental:toxic fumes are sometimes released in the process - 8what is an advantage and disadvantage of phytoextrction?environmental: generally considered more greener than smelting
economical:cheaper
it depends on weather to be run in operation - 9What inert metal?a metal that is not reactive
- 10what is oxidation? what is reduction? electronsOILRIG
Oxidation Is Loss Reduction Is Gain of electrons - 11what is electroplating?Electroplating is a process that uses an electric current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode
- 12what is the charge of an anode? what is the charge of a cathode?PANIC
Positive Anode
Negative Is Cathode - 13—