Question

Select all of the following that are true about your Zn-Ag cell.

Answer 1

Answer: The correct statements are :

a. Ag is gaining electrons. Zn is getting oxidized.

b.  Electrons travel toward the Ag half-cell.

c.  Ag is getting reduced.

d. Electrons travel away from the Zn half-cell.

Explanation:

Galvanic cell is a device which is used for the conversion of the chemical energy produces in a redox reaction into the electrical energy.

The standard reduction potential for zinc (Zn) and silver (Ag) are as follows:

$E^0_{Zn^{2+}/Zn}=-0.76V$

$E^0_{Ag^{+}/Ag}=+0.80V$

Reduction takes place easily if the standard reduction potential is higher (positive) and oxidation takes place easily if the standard reduction potential is less (more negative).

Here Zn undergoes oxidation by loss of electrons, thus act as anode. Silver undergoes reduction by gain of electrons and thus act as cathode. Thus the electrons will travel from Zn half cell to Ag half cell.

Anode : $Zn\rightarrow Zn^{2+}+2e^-$

Cathode: $Ag^++e^-\rightarrow Ag$

The correct statements are :

a. Ag is gaining electrons. Zn is getting oxidized.

b.  Electrons travel toward the Ag half-cell.

c.  Ag is getting reduced.

d. Electrons travel away from the Zn half-cell.