electrolysis Flashcards
(6 cards)
1
Q
positive electrode
A
anode
2
Q
where do negative ions go
A
the anode
3
Q
process of electrolysis of metals
A
negative ions go to anode
ions give their electrons to become neutral
electrons go to the cathode
cathode donates electrons to the positive ions, making them neutral
4
Q
why is carbon used as electrodes
A
it is inert and cheap and high melting point
5
Q
aqueous
which ion will the cathode discharge
A
the least reactive element (hydrogen, but copper is less reactive)
6
Q
aqueous
which ion will the anode discharge
A
the hydroxide unless halides are present
OH- -> 2H2O + O2 + 4e-
