What will be the cell potential for a cu−zn galvanic cell with [zn2+]=0.1 m and the [cu2+]=0.01 m? view available hint(s)?

Respuesta :

Answer: 1.07 V

Explanation: [tex]E^0_{[Zn^{2+}/Zn}=-0.76V[/tex]

[tex]E^0_{[Cu^{2+}/Cu]}=+0.34V[/tex]

The metal with negative reduction potential will easily lose electrons and thus is oxidized and the one with positive reduction potential will easily gain electrons and thus is reduced.

[tex]Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu[/tex]

[tex]E^o_{cell}[/tex] = standard electrode potential =[tex]E^0_{cathode}- E^0_{anode}=0.34-(-0.76)=1.1V[/tex]

Using Nernst equation:

[tex]E_{cell}=E^o_{cell}-\frac{0.0592}{n}\log \frac{[Zn^{2+}]}{[Cu^{2+}]}[/tex]

where,

n = number of electrons in oxidation-reduction reaction = 2

[tex]E_{cell}=1.10-\frac{0.0592}{2}\log \frac{[0.1]}{[0.01]}[/tex]

[tex]E_{cell}=1.07V[/tex]