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How would you determine the standard electrode potential of the system Mg2+|mg?

How would you determine the standard electrode potential of the system Mg2+|mg?

Grade:12

2 Answers

Pankaj
askIITians Faculty 131 Points
7 years ago

Using SHE as anode and Mg2+| Mg as a cathode we can measure the standard electrode potential of system Mg2+| Mg.

Anode: Standard Hydrogen Electrode

Cathode: Mg2+| Mg. (Mg electrode dipped in M MgSO4solution)

Cell : Pt(s), H2(g) | H+ || Mg2+| Mg(s).

Using formula

Eocell= Eoright– Eoleft

Eoleft=0

soEocell= Eoright = EoMg | Mg2+

Thanks & Regards

Pankaj Singh

askIITians Faculty

Vidhi Shah
28 Points
3 years ago
When we couplg electrode dipped in Mg2+ solution with SHE, the voltmeter reading will be equal to standard electrode potential of Mg2+|Mg system. We give negative sign to reduction potential because `Mg` acts as anode that is, undergoes oxidation.

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