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.

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:

= standard electrode potential =

The values have to be reduction potentials.  

Given: Reduction potential for atom X:

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.

= standard electrode potential =

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

the answer is c. nacl