QUESTION 1 4 points Save Answer lf a Galvanic cell s created using the Ag /Ag an

Question

QUESTION 1 4 points Save Answer lf a Galvanic cell s created using the Ag /Ag and Fe Feel half 2+ 3+ reactions, what is the net reaction for this electrochemical cell? QUESTION 2 points Save Answer What is the standard cell potential for the galvanic cell from question #1? Use the standard reduction potentials from the lecture Powerpoint slides to find the reduction potential of each half reaction, and then calculate the overall cell potential. O +0.030V O +0.77 V O +0.80 V O +1.57 V QUESTION 3 4 points Save Answer f a galvanic cel s created using the cu2+/cu and 2+. half reactions, and the initial concentration of copper(I) is 0.100 M and the initial concentration of zinc(l) is 1.90 M, what is the potential of this voltaic cell with these starting concentrations of metal cations? Hint: Calculate the standard cell potential for this cell first, then use the Nernst equation to determine the cell potential. 0.0592 v O 1.066 v 1.104 v 1.142

Explanation / Answer

(1)

(c) Fe2+ (aq.) + Ag+ (aq.) ---------------> Fe3+ (aq.) + Ag (s)

(2)

(A) E0cell = E0Ag+/Ag - E0Fe3+/Fe2+ = 0.800 = 0.770 = 0.0300 V

(3)

(b)

E0Cu2+/Cu = 0.34 V

E0Zn2+/Zn = - 0.76 V

E0cell = E0Cu2+/Cu - E0Zn2+/Zn = 0.34 - ( - 0.76 ) = 1.10 V

Over all cell reaction is,

Zn (s) + Cu2+ (aq.) -------------> Zn2+ (aq.) + Cu (s)

Applying Nernst euqation,

Ecell = E0cell - (0.0591/n)Log[Zn2+]/[Cu2+]

Ecell = 1.10 - (0.0591) * Log(1.90 / 0.100)

Ecell = 1.06 V

(4)

(A)

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

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