6. (20 points) Consider a galvanic cell consisting of the following two redox co

Question

6. (20 points) Consider a galvanic cell consisting of the following two redox couples: Ag+ (aq, 0.010 M) + e- Ag (s) CP"(ag, 0.010 M) + 3e Cr (s) E°= +0.80 V FO=-0.74 V a. Write the equation for the half-reaction at the cathode This is the cathode half reaction Ag + (aq) + e- Ag (s). Write the equation for the half-reaction at the anode This is the anode half reaction Cr3+ (aq)+3e Cr (s). b. c. Write a shorthand cell notation version of this battery Calculate the standard cell potential for this battery

Explanation / Answer

a)
At cathode, reduction occurs
The one with higher reduction potential will undergo reduction
Ag+ (aq) + e- —> Ag (s)

b)
At anode oxidation occurs
Cr(s) —> Cr3+ (aq) + 3 e-

c)
Cr(s)|Cr3+(aq,0.010)||Ag+(aq,0.010)|Ag(s)

d)
Eocell = Eocathode - Eoanode
= 0.80 - (-0.74)
= 1.54 V

Answer: 1.54 V

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