Chemistry-obtaining and using metals

Frage	Antworten
oxidation is the ____ of oxygen	gain
Reduction is the ____ of oxygen	loss
what is a displacement reaction?	were a higher reactive metal replaces a lower reactivity metal in a solution of its salt
how is gold ore found,why?	native, that unreactive that it doesn't react with any other metal
what is bio leaching?	using bacteria to extract metals as it breaks the weak bonds
what is phytoextraction?	using plants to extract low grade ores through their roots, then burning them to release the carbon leaving the impure ore
what 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
what 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
What inert metal?	a metal that is not reactive
what is oxidation? what is reduction? electrons	OILRIG Oxidation Is Loss Reduction Is Gain of electrons
what 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
what is the charge of an anode? what is the charge of a cathode?	PANIC Positive Anode Negative Is Cathode

Zusammenfassung der Ressource

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