Answer to Question #167379 in General Chemistry for Tjamilon

Question

The standard electrode potential for the Fe2+  ↔ Fe3+ + e – half reaction is -0.770 V. a) Using the Nernst equation [ E = E° − ( 0.059/n) log [Oxid]/[Red]] calculate the voltage of this half-cell when the [Fe3+] is 1.0 x 10 -3 and [Fe2+] is 1.0 x 10 -1. b) Calculate the approximate equilibrium constant (K) for the half reaction. 

 

Answer 1

E=-0.77 - (0.059/1) x log(1x10-3/1x10-1) = -0,652 V.