00:01
If we have a solution that contains pb2 plus and br minus, then at the anode where oxidation occurs, the two potential reactions are the oxidation of bromide to br2, releasing two electrons, or it would be the oxidation of water.
00:32
The potential for this to occur is the negative of the reduction potential in reverse.
00:45
If we look that up, e standard oxidation for this is going to be e reduction is positive 1 .09 volts, so this will be negative 1 .09 volts.
01:02
The other possible reaction is water itself being oxidized.
01:11
According to its half reaction, water, when it's oxidized, it produces o2 for h plus and for electrons and it's standard.
01:34
Well this wouldn't be standard.
01:37
I think they say when it's ph 7.
01:40
But anyway, it's oxidation potential is negative 0 .82 volts...