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sage
Oh and to enlighten further on why salt can be dangerous, Is because... due to it being soluble etc etc, NaCl molecules seperate to form Na+ and Cl- ions, which then are free moving charges (electricity). If that were a DC power source, which it's not... Then you would end up with the cation (Na+) at the cathode (- Electrode), and the anion (Cl-) at the anode (+ Electrode). This is an often used factory process for preparing chemicals, it's called electrolysis.
This being an AC power supply (If I remember correctly, having to think back to year 13 chemistry here...), then you would get both elements being oxidised and reduced at both electrodes, hence you would obtain Sodium and Clorine elements, as the ions are oxidised and reduced.
In industry I think they only ever use a DC current. With both an anode and a cathode, which makes the whole thing alot simpler, that way you can also make the electrodes out of the right materials etc.
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