metals and alloys elctrolyte Flashcards
1
Q
name 3 advantages of recycling copper
A
energy cost to melt is low because of low melting point
reduces need for mining, saving reserves
lowers cost of copper
2
Q
what are the disadvantages name 3?
A
difficult to seperate in small amounts
less copper is mined so fewer jobs
may produce pollution separating
3
Q
explain what happens in the purification of copper?
A
an electrolyte of copper II sulfate solution is used
the impure copper is the anode and a sheet of pure is the cathode
anode loses dossolves
cathode gains mass
4
Q
what happens at the anode?
A
the cu atoms lose electrons to form cu2+ ions. This is called oxidation
5
Q
what happens at the cathode?
A
copper is plated when cu2+ ions gain electrons. This is reduction
