00:01
To answer this question, we simply need to know the chemical reaction that describes the electrochemical cell.
00:09
And that is provided for both parts of this question.
00:13
We have cr3 -plus reacting with chlorine gas producing dichromate and chloride.
00:21
You notice that it is not balanced.
00:23
We have oxygens here.
00:25
We don't have any oxygens over here.
00:27
So it's likely that we will balance our oxygens with water, which will then introduce some hydrogens.
00:35
So when we look up the two half reactions that comprise this entire reaction, we will probably see in the half reaction of chromium some water and some hydrogen ions, not explicit in this unbalanced redox reaction.
00:54
So take that into account when you're looking up the reduction potentials for the half reactions because you will need these reduction potentials for the half reactions to calculate the cell potential.
01:08
Cell potential will be equal to the standard reduction potential for the cathode minus the standard reduction potential for the anode...
