Oxygen Evolution pH (Jee Mains) | ExamDuo
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Cell EMF and Thermodynamics
Medium
Oxygen Evolution pH
Consider the following electrochemical cell :
Pt | O
2
(g) (1bar) | HCl (aq) || M
2+
(aq, 1.0 M) | M(s)
The pH above which, oxygen gas would start to evolve at anode is _______ (nearest integer).
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![\left[ {\begin{array}{*{20}{c}} {Given:}&{\left. {\begin{array}{*{20}{c}} {E_{{M^{2 + }}/M}^0 = 0.994V}\\[0.9em] {E_{{O_2}/{H_2}O}^0 = 1.23V} \end{array}} \right\}\;{\text {standard reduction potential}}}\\[0.9em] {}&{and\;\frac{{RT}}{F}(2.303) = 0.059\;V\;at\;the\;given\;condition} \end{array}} \right]](https://d2lbh14zkcqlst.cloudfront.net/content_data/content_images/1771656356442749892.png)