Name: 6. Which of the following statements is true concerning the electrochemica

Question

Name: 6. Which of the following statements is true concerning the electrochemical cell depicted below? Mn2+(aq) + 2e Mn(s); Eo =-1.19 V a. The cell is at equilibrium. b. The cell reaction is spontaneous with a standard cell potential of 1.72V. c· The cell reaction is spontaneous with a standard cell potential of 4.1 V d· The cell reaction is nonspontaneous with a standard cell potential of 4.1 V e The cell reaction is nonspontaneous with a standard cell potential of-1.72V Which of the following cell reactions would require the use of an inert electrode? a. 7. b. c. d. e. Fe(s) + 2Ag+(aq) 2Ag(s) + Fe2+(aq) 3 Cu(s) + 2Au3+(aq) 3Cu2+ + 2Au(s) Fe(s) + 2Ag+(aq) Fe2+(aq) + 2Ag(s) Fe(s) + 2MnO2(s) + 2NH4+(aq) Fe2+(aq) + Mn2O3(s) + 2NH,(aq) + H20() 3Zn2+(aq) + 2Al(s) 3Zn(s) + 2AP"(aq)

Explanation / Answer

Ans 6 : e) The cell reaction is nonspontaneous with a standard cell potential of -1.72 V.

Ecell = Eright - Eleft

Ecell = EMn2+/Mn - EBa2+/Ba

Ecell = -2.91 - (-1.19)

Ecell = -1.72 V

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