Question

A concentration cell is constructed by using the same half-reaction for both the cathode and anode. What is the value of standard cell potential, for a concentration cell that combines a silver anode in contact with 0.10 M silver nitrate and a silver cathode in contact with 0.00003 M silver nitrate

Answer 1

A cell that is concentrated is constructed by the same half reaction for the anode as well as he cathode.

We know,

In a standard cell,

the reduction half cell reaction is :

`$Ag^+(aq)+e^- \rightarrow Ag(s) E^0 = -0.80 \ V$`

The oxidation half ell reaction :

`$Ag(s) \rightarrow Ag^+(aq) + e^- \ E^0= +0.80 \ V$`

Thus the complete reaction of the cell is :

`$Ag^+(aq)+ Ag(s) \rightarrow Ag^+(aq)+Ag(s)$`

`$E^0 $` cell =
`$E_R - E_L = 0.00 \ \text{volts}$`