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Write the Nernst equation & EMF of the c...

Write the Nernst equation & EMF of the cells at 298 K :
`Sn(s)|Sn^(2+)(0.050M)||H^(+)(0.020M)|H_(2)(g)("1 bar")|Pt(s)`

Text Solution

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Cell reaction : `Sn+2H^(+)rarr Sn^(2+)+H_(2) (n=2)`
Nernst equation : `E_("cell")=E_("cell")^(@)-(0.059)/(2)"log"([Sn^(2+)])/([H^(+)]^(2))`
`=0-(-0.14)-(059)/(2)"log"(0.05)/((0.02)^(2))`
`=0.14-0.02955xxlog 125=0.078 V`
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