Do you mean that by adding ions that we can enhance the equilibrium of noble atoms. For example to make these equilibrium more considererable.
No idea what you mean by "enhancing the equilibrium". Adding ions you simply shift the equilibrium that exists in the solution.
So in this case is this the result of water's half equation or Fe simply turn s into Fe3+. If that is the case we'll have two half equations that cancel out.
PLease elaborate, I have no idea what you are talking about.
I have seen many pracs using Cu electrode. How can an equilibrium created then.
Copper in fact does react with H
+, but the equilibrium concentration of Cu
2+ is in the range of 5x10
-12M. That's the original equilibrium that is created automatically when you put pure copper wire into pH 0 solution. But you may as well put copper wire into 1M Cu
2+ solution, in boith cases copper wire will be in th eequilibrium with the copper solution, just the potential of the wire (as measured against some other electrode) will be different.
Also we just did a prac with Carbon inert electrode and KI solution in one half cell.
Reduction occured in that cell. I2 + 2e ------> 2I-
Now there was no I2 to begin with so how did this reaction occur. I checked as you have said with H+ but no spontaneous reaction occurs.
Yes, it occurs spontaneously, just the equilbrium concentrations is so low, that it is below the detection limit. So to simplify things we say that the reaction doesn't occur - but as you have spotted it leads to inconsistencies.