New answers tagged electrolysis
6
The figures in the OP's post are nicely drawn, as expected in a modern textbook, but figure 3.2(c) has the external battery reversed, which is incorrect. Here is how it works, without the needless complication of the potentiometer.
First, start with a standard Daniell cell with standard assumptions, i.e., negligible internal resistance, unimolar ...
0
You see, in electrolytic refining, the goal is to get pure metal on the anode. Let us take a specific case of electrolytic refining of $\ce{Cu}$. Normally we would use $\ce{CuSO4}$ solution, so let us take that case.
Impure copper is set as the anode, $\ce{Cu^{2+}}$ ions are released. But you see, the $\ce{Cu^{2+}}$ ions from the anode don't directly go to ...
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