1.

What is the EMF of the cell? `Zn(s)|Zn^(2+)+(0.1M)||Sn^(2+)+(0.001M)||Sn(s)`. Given `E^(@)Zn^(2+)//Zn=0.76V,E_(Sn^(@2+)//Sn=-0.14V`A. 0.62VB. 0.56VC. 1.12VD. 0.31V

Answer» Correct Answer - B
`Zn(s)+Sn^(2+)rarrZn^(2+)(aq)+Sn(s)`
`E_("cell")=E_("cell")^(@)-(0.059)/(n)"log"([Zn^(2+)])/([Sn^(2+)])`
`=[0.14-(-0.76)]-(0.059)/(2)"log"(0.1)/(0.001)`
`=+0.62-(0.059)/(2)"log"100=+0.56V`


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