Question

The standard EMFfor the given cell reaction `Zn+Cu^(2+)toCu+Zn^(2+)` is 1.10V at `25^(@)C`. The EMF for the cell reaction, when 0.1M `Cu^(2+) and 0.1M" "Zn^(2+)` solution are sued, at `25^(@)C` is
A. 1.10V
B. 0.110V
C. `-1.10V`
D. `-0.110V`

Answer 1

Correct Answer - A
`E_(cell)=(E_(cell)^(o)-(0.059)/(2)"log"((Zn^(++)))/(Cu^(++)))`
`=1.10-(0.059)/(2)"log"(0.1)/(0.1)=1.10V`