In part B of Lab 11, you measured the voltage of several galvanic cells. Assembl

Question

In part B of Lab 11, you measured the voltage of several galvanic cells.

Assemble a battery, represented by the diagram below with the cathode in compartment A, with Zn2+/Zn and Sn2+/Sn couples in which the voltage reads positive. (Use the Standard Reduction Potentials Table. Use the lowest possible coefficients. Omit states-of-matter from your answer.)

(a) What half-reaction occurs in compartment A?

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(b) What half-reaction occurs in compartment B?

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(c) Write the net redox reaction.

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Explanation / Answer

Ans (a) compartment A has positive voltage that menas it acts as a cathode

Sn2+ + 2e = Sn

(b) compartment B has negative voltage and it acts as anode

Zn = Zn2+ + 2e

(c) Net redox reaction

Sn2+ + Zn = Sn + Zn2+

(d) Cell potential= Ecathode -Eanode = -0.14 - (-0.76) = 0.62V

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