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We can make a simple voltaic cell consisting of Cu and Zn electrodes dipped in an aqueous H2SO4 solution for demonstration purposes. I am curious to know whether this has a constructible cell notation or not, since I have not come across one in any book so far.

Also, the cell reaction generates H2 gas which makes me doubt that an electric double layer involving H+ ions is formed faster than that involving Cu2+ ions from a Cu electrode. It is also For the reason that , we see no detectable blue colouration around Cu when the set up - simple cell is in operation. Is that right?

Moreover, does the acidic solution have a liquid junction potential?

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  • $\begingroup$ This is simply a variant of the well-known lemon cell, i.e., lemon ‘battery’. $\endgroup$
    – Ed V
    Nov 14, 2022 at 1:46
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    $\begingroup$ It is cell Zn/Zn^2+ H+/H2. Cu acts as pseudo inert electrode there. Cu^2+ would be reduced first, before H+, but there are no Cu^2+ ions. $\endgroup$
    – Poutnik
    Nov 14, 2022 at 5:55
  • $\begingroup$ "There are no Cu²+ ions." Does this mean double layer of Cu/ Cu²+ is negligible? It is little unconvincing, because Cu can dissolve in H2SO4 unlike pt/C $\endgroup$
    – Sudhagar
    Nov 14, 2022 at 16:00
  • $\begingroup$ Well...this notation apparently lacks symbols for junction potential/anode cathode separation etc... Is it possible to write like this? $\endgroup$
    – Sudhagar
    Nov 14, 2022 at 16:21

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