c6

Question 1

name of postive and negative ions

Answer 1

positive- cations
negative-anions

Question 2

name of positve and negative electrode

Answer 2

positive- anode
negative- cathode

Question 3

why is it important for ions to be able to move?

Answer 3

so they can carry charge

Question 4

what does a power pack do at the cathode and anode?

Answer 4

at cathode- uses energy to push electrons onto it
at anode- uses energy to pull electrons from it

Question 5

why does aluminium end up at the bottom during electrolysis?

Answer 5

denser than electrolyte

Question 6

what does cryolite reduce the melting temp down to?

Answer 6

900-1000 degrees c

Question 7

difference between moletn and aqueos

Answer 7

aq contains water

Question 8

if more reactive than hydrogen at cathode?

Answer 8

hydrogen forms

Question 9

at anode if halide?

Answer 9

halogen forms (i2)

Question 10

if not halide at anode?

Answer 10

OH- molecules form oxygen

Question 11

4OH- equals?

Answer 11

H20 add o2 add 4e-

Question 12

what happens to any ions that are not oxidised /reduced?

Answer 12

left in solutuion so form 3rd product