The following galvanic cell has a measured cell potential E°_cell = 0.646 V.
Pt(s) ∣ Sn⁴⁺(aq) ,Sn²⁺(aq) Ag⁺(aq) ∣ Ag(s)
Given that the standard reduction potential for the reduction of Ag⁺(aq) to Ag(s) is +0.800 V,what is the standard reduction potential for the Sn⁴⁺/Sn²⁺ half-reaction?

Question

The following galvanic cell has a measured cell potential E°_cell = 0.646 V.
Pt(s) ∣ Sn⁴⁺(aq) ,Sn²⁺(aq)

The following galvanic cell has a measured cell potential E°<sub>cell</sub> = 0.646 V. Pt(s) ∣ Sn<sup>4+</sup>(aq) ,Sn<sup>2+</sup>(aq) Ag<sup>+</sup>(aq) ∣ Ag(s) Given that the standard reduction potential for the reduction of Ag<sup>+</sup>(aq) to Ag(s) is +0.800 V,what is the standard reduction potential for the Sn<sup>4+</sup>/Sn<sup>2+</sup> half-reaction? A) +0.154 V B) -0.154 V C) +1.45 V D) -1.45 V E) +0.308 V

Ag⁺(aq) ∣ Ag(s)
Given that the standard reduction potential for the reduction of Ag⁺(aq) to Ag(s) is +0.800 V,what is the standard reduction potential for the Sn⁴⁺/Sn²⁺ half-reaction?

Quizplus · Accepted Answer

The cell potential for a galvanic cell is given by the difference between the reduction potentials of the two half-cells.

Ecell = Ered,cathode - Ered,anode

In this case, the half-cell with the silver electrode is the cathode (where reduction occurs), and the half-cell with the tin electrode is the anode (where oxidation occurs).

Given that E°red,Ag+ /Ag = +0.800 V, we can use the measured cell potential to find the standard reduction potential for the tin half-reaction:

E°red,tin = Ered,cathode - Ecell

E°red,tin = +0.800 V - 0.646 V

E°red,tin = +0.154 V

Therefore, the answer is A: +0.154 V.

The Following Galvanic Cell Has a Measured Cell Potential E°cell

The Following Galvanic Cell Has a Measured Cell Potential E°_cell