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An electrochemical cell is based on the following two half-reactions: Ox: Sn(s)→Sn2+(aq, 1.65 M )+2e− Red: ClO2(g, 0.165...

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Chemistry

An electrochemical cell is based on the following twohalf-reactions:

Ox: Sn(s)→Sn2+(aq, 1.65 M )+2e−

Red: ClO2(g, 0.165 atm )+e−→ClO−2(aq,1.90 M )

Compute the cell potential at 25 ∘C.

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4.2 Ratings (888 Votes)

Ans:- Compute the cell potential at 25 ∘C.

         Ox:   Sn(s)→Sn2+(aq, 1.65 M )+ 2e− : E = -0.14v

          Red: ClO2(g, 0.165 atm )+ e−→ClO−2(aq, 1.90 M): E = 0.954v

E0 = EC - EA

= 0.954-(-0.14)

= 1.094v

              NERNST EQUTION:   E = E0 -0.0591/2*log (cathode)/(anode)

                                 E = 1.094-0.029*log(1.90)2/(1.65)

                             E = 1.094-0.029*log 2.1878

                             E = 1.094-0.029*0.34

                             E = 1.0842 Volts
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