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A comment on “You don't have a voltmeter. Do you have a potato?”. Parent comment

Re:“You don't have a voltmeter. Do you have a potato?” by robocat on Thursday November 24, 2022 @11:57PM (#33739347)
The way to remember it is that the negative ions of Chlorine Cl- move towards the positive wire electrode.

At the copper wire of the positive electrode the chlorine reacts with the copper to make green hydrated copper(II) chloride - CuCl2·2H2O - https://en.m.wikipedia.org/wiki/Copper(II)_chloride

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