Answered: When constructing this cell, a metal…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

The standard reduction potential for two two pairs of redox species are shown below. These two reactions are used to design a spontaneous, galvanic cell. When constructing this cell, a metal strip of which metal should be used in the anode compartment?

Ag⁺(aq) + e^- → Ag(s) E° = 0.80 V

Sn⁴⁺(aq) + 2e^- → Sn²⁺ (s) E° = 0.15 V

		Pt (s) and Sn (s)
		Pt (s)
		Ag (s)
		Sn (s)

Expert Solution

concept

galvanic cell involves spontaneous reaction in which the half reactions are separated where oxidation and reduction takes place.

oxidation occurs at anode

reduction occurs at cathode.

Step 1

$A g^{+} (a q) + e^{-} \to A g_{(s)} E^{0} = 0.80 v {S n}^{4 +}_{(a q)} + 2 e^{-} \to S n^{2 +} E^{0} = 0.15 v f o r s p o n \tan e o u s r e a c t i o n c e l l p o t e n t i a l i s p o s s i t i v e a n d f o r t h a t t h e s \tan d a r d r e d u c t i o n p o t e n t i a l o f s n s h o u l d b e l e s s t h a n t h e s \tan d a r e d r e d u c t i o n p o t e n t i a l o f A g t h e r e f o r e w e c a n s a y t h a t o x i d a t i o n i s t a k e s p l a c e a t s n (s) b y r e v e r \sin g t h e r e a c t i o n o f S n, S n^{2 +} \to {S n}^{4 +}_{(a q)} + 2 e E^{0} = - 0.15 v l o s e o f e l e c t r o n t h a t i s o x i d a t i o n c e l l p o t e n t i a l = E^{0} r e d u c t i o n - E^{0} o x i d a t i o n = 0.80 v - (- 0.15) = 0.95 v$

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