The dissolution reaction of a sparingly soluble PbSO4 salt is given by, => PbSO4 (s) ------> Pb2+ (aq) + SO42- (aq) b) The half reactions given are, 1) Pb2+ (aq) + 2 e- -------> Pb (s) Eored = -0.1262 V 2) PbSO4 (s) + 2 e- -----> Pb (s) + SO42- (aq) Eored = -0.3505 V => Pb2+ (aq) + SO42- (aq) -------> PbSO4 (s) E = -0.1262 - (-0.3505) = 0.2243 V Hence the cell potential is 0.2243 V.
The dissolution reaction of a sparingly soluble PbSO4 salt is given by, => PbSO4 (s) ------> Pb2+ (aq) + SO42- (aq) b) The half reactions given are, 1) Pb2+ (aq) + 2 e- -------> Pb (s) Eored = -0.1262 V 2) PbSO4 (s) + 2 e- -----> Pb (s) + SO42- (aq) Eored = -0.3505 V => Pb2+ (aq) + SO42- (aq) -------> PbSO4 (s) E = -0.1262 - (-0.3505) = 0.2243 V Hence the cell potential is 0.2243 V.
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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The dissolution reaction of a sparingly soluble PbSO4 salt is given by,
=> PbSO4 (s) ------> Pb2+ (aq) + SO42- (aq)
b) The half reactions given are,
1) Pb2+ (aq) + 2 e- -------> Pb (s) Eored = -0.1262 V
2) PbSO4 (s) + 2 e- -----> Pb (s) + SO42- (aq) Eored = -0.3505 V
=> Pb2+ (aq) + SO42- (aq) -------> PbSO4 (s) E = -0.1262 - (-0.3505) = 0.2243 V
Hence the cell potential is 0.2243 V.
Transcribed Image Text:E° red
Pb²*(aq) + 2e- → Pb(s)
0.1262 V
Ered
PBSO«(s) + 2e- → Pb(s) + SO,²(aq)
0.3505 V
c) Calculate the equilibrium constant at 283 K (10.° C) for the
spontaneous redox reaction you wrote in part b.
d) Using only the information provided in this problem, calculate
the solubility product constant of lead(II) sulfate at 10, °C.
e) Is the dissolution of lead(11) sulfate at 10. °C
thermodynamically favorable? Justify your response by
determining AG°n at 10. °C, using only the information
provided or determined in this problem.
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