Atoms A and X are fictional atoms. Suppose that the standard potential for the reduction of X^2+ is +0.51 V, and the standard potential for the reduction of A^2+ is -0.33. Find the standard potential for an electrochemical cell with the cell reaction that follows.

If you are given the standard potential for the reduction of X^2+ is +0.51 V, and the standard potential for the reduction of A^2+ is -0.33, just add the two. The standard potential for an electrochemical cell with the cell is 0.18V

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kobenhavn kobenhavn · Answer 2 · 2019-06-11T09:21:24+02:00

Answer: Thus the standard potential for an electrochemical cell with the cell reaction that follows is 0.84 V.

Explanation:

Standard potential for an electrochemical cell is given by:

[tex]E^0{cell}[/tex] = standard electrode potential =[tex]E^0{cathode}-E^0{anode}[/tex]

The [tex]E^0[/tex] values have to be reduction potentials.

Given: Reduction potential for atom X:

[tex]E^o_{X^{2+}/X}=+0.51V[/tex]

[tex]E^o_{A^{2+}/A}=-0.33V[/tex]

The element A with negative reduction potential will lose electrons undergo oxidation and thus act as anode.The element X with positive reduction potential will gain electrons undergo reduction and thus acts as cathode.

[tex]X^{2+}+A\rightarrow X+A^{2+}[/tex]

[tex]E^0{cell}[/tex] = standard electrode potential =[tex]E^0{cathode}-E^0{anode}=+0.51-(-0.33)=0.84V[/tex]

Thus the standard potential for an electrochemical cell with the cell reaction that follows is 0.84 V.