8) An electrochemical cell has been assembled with an external wire connecting t

Question

8) An electrochemical cell has been assembled with an external wire connecting the and a salt bridge containing KCl between the two cells. One electrolyte solution in is ZnSO4 (aq) and the other electrolyte in the other cell is AgNO3. The overall cell is: Zn(s) + 2Ag+(aq) Zn2+(aq) + 2Ag(s) (a) On the diagram below, label in the appropriate place: (i) the anode and the cathode, with appropriate metal (ii) the constituents of each half cell, including the ions in solution (iii) the number and the direction of electron flow (iv) the direction of cation and anion flow in the salt bridge

Explanation / Answer

a)

(i) anode : left hand side cell  appropriate metal Zn

     cathode : right hand side cell appropriate metal Ag

(ii) anode half-cell : constituetns Zn metal in ZnSO4 solution

     in this cell oxidation takes place

    Zn (s) ---------------------> Zn+2 (aq) + 2e-

    cathode half -cell :    constituetns Ag metal in Ag solution

in this cell reduction takes place

     2 Ag+ (aq) + 2e-   --------------------> 2Ag (s)

total cell reaction :   Zn (s) + 2Ag + (aq) ----------------> Zn+2 (aq) + 2 Ag

(iii) Two electrons flow from left hand electrode to right hand electrode (from left to right)

      electrons always flow from anode to cathode and current flow from right to left

(iv) anions flow from right to left

    cations flows from left to right

Related Questions

Navigate

• Browse (All)
• Browse 8
• Subjects

---

---

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