Ok, so let's say I have raw silver which is polluted with a bit of gold, copper and lead. So through electrorefining I want to make pure silver out of it.
Let's say I have it all in an acidic solution. What happens when I turn on the Voltage? How would I prevent the other elements from getting electrolyzed? Because when I have the electrorefining of copper it gets clean even when polluted with silver, so why doesn't the copper get electrolyzed as well?