Write directly on the exam. Consider the following standard reduction potentials

Question

Write directly on the exam. Consider the following standard reduction potentials, a. Write the equation that produces a voltaic cell. b. Calculate E degree cell. c. Calculate delta G degree (in kJ) for the reaction at 298K. d. Calculate Keq for the reaction. How does the magnitude of the equilibrium constant relate to the E degree _cell? e. Draw a picture of the voltaic cell. Label the cathode and anode including any inert electrodes. Show the flow of electrons. To which side will the anion of the salt bridge flow?

Explanation / Answer

Q16

a)

Sn4+ + 2e- --> Sn2+

Li+ + e- --> Li(s)

solve

2 Li(s) + Sn4+ + 2e- --> Sn2+ + Li+ + e-

b)

E° = Ered - Eox = 0.154 - -3.04 = 3.194 V

c)

dG = -nF*E°cell

n= 2electrons, F = 96500 C/mol

dG = -2*96500*3.194

dG = -616442 J/mol

dG = - 616.442 kJ/mol

d)

dG = -RT*ln(K)

Keq = exp(-dG/(RT))

Keq = exp(616442/(8.314*298))

Keq = 1.1385*10^108

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.