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What is the emf of a cell made up of a copper electrode and a hydrogen electrode (p, = 2 atm) in copper sulfate (activity Cu = 1) of pH = 1? What is the polarity of the cell and which electrode is anode?

What is the emf of a cell made up of a copper electrode and a hydrogen electrode (p, = 2 atm) in copper sulfate (activity Cu = 1) of pH = 1? What is the polarity of the cell and which electrode is anode?

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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8. (a) What is the emf of a cell made up of a copper electrode and a hydrogen electrode (p, = 2 atm) in copper sulfate (activity Cu = 1) of pH = 1? (b) What is the polarity of the cell and which electrode is anode? 9. (a) Calculate whether copper will corrode in deaerated CuSO, pH = 0, to form Cu- (activity = 0.1) and H, (1 atm). What is the corrosion tendency in volts? (b) Similarly, calculate whether copper will corrode in deaerated KCN (activity CN = 0.5) of pH = 10, assuming that Cu(CN); is formed, the activity of which is 10. Cu(CN), +e→ 2CN- +Cu -0.446 V 10. (a) Calculate the emi of the following cell: Pt; Fe* (activity = 0.1), Fe (activity 0.001), Ag* (activity 0.01); Ag (b) Write the spontaneous reaction for the cell. What is the polarity and which electrode is anode? 11. (a) Calculate the emf of a concentration cell made up of copper electrodes in 0.1M CUSO, and 0.5 M CuSO,, neglecting the liquid-junction potential. (b) Write the spontaneous reaction of the cell and indicate which electrode is anode. 12. (a) Calculate the emf of the following cell at 40 °C: O, (latm), Pt; H,O; O, (0.1atm), Pt (b) What is the polarity and which electrode is anode?
Transcribed Image Text:8. (a) What is the emf of a cell made up of a copper electrode and a hydrogen electrode (p, = 2 atm) in copper sulfate (activity Cu = 1) of pH = 1? (b) What is the polarity of the cell and which electrode is anode? 9. (a) Calculate whether copper will corrode in deaerated CuSO, pH = 0, to form Cu- (activity = 0.1) and H, (1 atm). What is the corrosion tendency in volts? (b) Similarly, calculate whether copper will corrode in deaerated KCN (activity CN = 0.5) of pH = 10, assuming that Cu(CN); is formed, the activity of which is 10. Cu(CN), +e→ 2CN- +Cu -0.446 V 10. (a) Calculate the emi of the following cell: Pt; Fe* (activity = 0.1), Fe (activity 0.001), Ag* (activity 0.01); Ag (b) Write the spontaneous reaction for the cell. What is the polarity and which electrode is anode? 11. (a) Calculate the emf of a concentration cell made up of copper electrodes in 0.1M CUSO, and 0.5 M CuSO,, neglecting the liquid-junction potential. (b) Write the spontaneous reaction of the cell and indicate which electrode is anode. 12. (a) Calculate the emf of the following cell at 40 °C: O, (latm), Pt; H,O; O, (0.1atm), Pt (b) What is the polarity and which electrode is anode?
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