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The life of a daniel cell may be increas...

The life of a daniel cell may be increased by:

A

increasing the concentration of `Zn^(2+)` ions

B

increasing the concentration of `Cu^(2+)` ions

C

increasing the concentration of `Cu^(2+)` ions

D

decreasing the concentration of `Zn^(2+)` ions.

Text Solution

Verified by Experts

The correct Answer is:
B,D
The electrochemical reaction for Daniel cell is
`Zn+Cu^(2+)rarrCu+Zn^(2+)`
`E_("cell")=E_("cell")^(@)-(0.0591)/( 2)"log"([Zn^(2+)])/([Cu^(2+)])`
`=E_("cell")^(@)+(0.0591V)/(2)"log" ([ Cu^(2+)])/([Zn^(2+)])`
`E_("Cell")` can be increased by increasing `[Cu^(2+)]`
and decreasing `[Zn^(2+)]`
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