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Chemistry
Daniell cell initial equilibrium
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[QUOTE="mjc123, post: 6177034, member: 610180"] I'm not sure we know. We can measure the potential difference between two electrodes, so if we define the potential of one electrode (0.0V for the standard hydrogen electrode), we can assign electrode potentials to other electrodes. But we can't (I think) measure the potential of a single electrode, so we don't know absolutely how positive or negative the metal is. I don't think link 2 actually states that Cu becomes positive in the absence of an electrical connection (Cu [SUP]2+[/SUP] is reduced when a current flows); only that Cu is more positive/less negative than Zn. Likewise link 1, at least at the beginning, talks about what happens when a metal is immersed in water (not a solution of its ions). [/QUOTE]
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Daniell cell initial equilibrium
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