Per the explanation in what's going on?.....the thin film of sweat on your
hands acts like the acid in a battery reacting with the copper plate and
with the aluminum plate. In one of these reactions, your hand takes
negatively charges electons....
I do not agree. Something else is happening. I put the two plates (zinc and
copper this time) side by side (1-2 inches apart) and made a "bridge" out of
litmus paper that was soaked in a saturated NaCl solution. The meter
registered 0.37 volts DC. There is no acid to react this time. The copper
was well polished. I can conjecture that the more active zinc was losing
electrons. However, how was the copper receiving them if there are not
copper +1 or + 2 ions.
I do not have an explanation.
Fred Olenick
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