Q. 15

Calculate <span l

Answer :

Eocell,also called as cell voltage or cell potential,is the electromotive force between two half-cells.


Eocellcan be calculated as follows:



Eocell= -0.44-(-0.74) = 0.30 V


In this above reaction, six electrons are transferred from Cr to Fe


From the nernst equation at 298K,


Ecell= Eocelllog (here n is no. of electrons participated in given reaction)


Ecell= Eocell- log


Ecell= 0.30 + 0.01 = 0.31V


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