Electrochemistry Flashcards
1
Q
what side is anode and cathode
A
anode on the left, cathode on the right
2
Q
the anode always ….
A
oxidises
3
Q
the cathode always …
A
reduces
4
Q
give an example of an oxidation equation
A
Cu (s) -> Cu^2+ (aq) + 2e-
5
Q
give an example of a reduction equation
A
Ag+ (aq) + e- -> Ag(s)
6
Q
the ____ needs to be higher up in the electrochemical series for it to be spontaneous
A
solute
7
Q
what does Ecell measure ?
A
the difference between their reduction potential of each half cell.
8
Q
what is the value of the standard hydrogen electrode
A
0.00
9
Q
when calculating Ecell make sure the most positive value is …
A
on the top
10
Q
if Ecell standard is > 0 then
A
the reaction is spontaneous
11
Q
if Ecell standard is < 0 then
A
the reaction isn’t spontaneous.
12
Q
the larger Ecell is more easily
A
reduced
13
Q
Ecell =
A
E(cathode) - E(anode)
