Single electrode potential

1. Single electrode potential
and
Standard electrode potential
Dr. Mithil Fal Desai
Shree Mallikarjun and Shri Chetan
Manju Desai College Canacona Goa

2. Electrochemical cell
Cathode
Anode
1.1 V
Zne-
Cu2+
Zn2+
(aq)
(s)
e-
Cu
(aq)
(s) K+
Cl-K+
Cl-

3. Electrochemical cell
Cathode
Anode
1.1 V
Zn
e-
Cu2+
Zn2+
(aq)(s)
e-
Cu
(aq) (s) K+ Cl-

4. Electrochemical cell
Single electrode potential is a measure of tendency
of an element to loose or gain electron when it is in
its own solution. (measure of individual electrode
contribution on the cell voltage)
Standard electrode potential is a potential of a cell in
which redox couple forms right hand electrode and
left hand electrode is a standard hydrogen electrode
and all species are at unit activity and 298 K.
Pt(s)/H2(g)(1 atm)/H+
(aq) (1 M)//Mn+
(aq) (1 M)/M(s) at 298K