Electrolysis Flashcards
1
Q
why must the power supply in electrolysis be D.C?
A
so the current flows one way
2
Q
What is the Cathode?
A
the negative electrode
3
Q
What is the Anode?
A
the positive electrode
4
Q
what are the electrodes?
A
inert conductors made of graphite
5
Q
what is the electrolyte?
A
solution containing ions
6
Q
What occurs during electrolysis?
A
the cations(positive ions) are attracted towards the cathode where they gain e- and are reduced to form neutral atoms.
the anions are attracted towards the anode where they lose e- and are oxidised to neutral atoms
electrons flow from negative to positive electrode
7
Q
what is electroplating?
A
uses electrolysis to coat a cheap metal with a more expensive one or for protection
