SELECT * FROM question_mgmt as q WHERE id=1791 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=58 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th chemistry Electrochemistry how would you determine the standard electrode pot

Question:

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

Answer:

The standard electrode potential of Mg2+| Mg can be measured with respect to the standard hydrogen electrode, represented by Pt(s), H2(g)(1 atm) | H+(aq) (1 M).

A cell, consisting of Mg | MgSO4(aq 1 M) as the anode and the standard hydrogen electrode as the cathode, is set up.

Then, the emf of the cell is measured and this measured emf is the standard electrode potential of the magnesium electrode.

Eø  = EøR  - EøL

Here,EøR for the standard hydrogen electrode is zero.

∴ Eø = 0 - EøL

= - EøL


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