A variable opposite external potential ( E text ext ) is applied to the cell Zn | Zn 2+(1 M ) | Cu 2+(1 M )| Cu, of potential 1.1 V. When E ext

Question

A variable opposite external potential ( E text ext ) is applied to the cell Zn | Zn 2+(1 M ) | Cu 2+(1 M )| Cu, of potential 1.1 V. When E ext <1.1 V and potential 1.2 V respectively electron flow from: (A) anode to cathode and cathode to anode (B) cathode to anode and anode to cathode (C) cathode to anode in both cases (D) anode to cathode in both cases

Tardigrade Admin · Accepted Answer

When E text ext <1.1 V, the electrons will flow from anode to cathode, the cell will act as the galvanic cell. when E text ext >1.1 V, electrons will flow from cathode to anode and the cell will act as electrolytic cell.

Q. A variable opposite external potential $(E_{ext})$ is applied to the cell $Z n ∣ ∣ Z n^{2 +} (1 M) ∥ C u^{2 +} (1 M) ∣ ∣ C u$ , of potential $1.1 V$ . When $E_{e x t} < 1.1 V$ and potential $1.2 V$ respectively electron flow from:

anode to cathode and cathode to anode

cathode to anode and anode to cathode

cathode to anode in both cases

anode to cathode in both cases

When $E_{ext} < 1.1 V$ , the electrons will flow from anode to cathode, the cell will act as the galvanic cell.
when $E_{ext} > 1.1 V$ , electrons will flow from cathode to anode and the cell will act as electrolytic cell.

Q. A variable opposite external potential (Eext ​) is applied to the cell Zn∣∣​Zn2+(1M)∥Cu2+(1M)∣∣​Cu, of potential 1.1V. When Eext​<1.1V and potential 1.2V respectively electron flow from: