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

Write the Nernst equation & EMF of the cells at 298 K :
`Pt(s)|Br_(2)(l)Br^(-)(0.010M)||H^(+)(0.030M)|H_(2)(g)|("1 bar")Pt(s)`

Text Solution

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Cell reaction : `2Br^(-)+2H^(+)rarr Br_(2)+H_(2)`
Nernst equation : `E_("cell")=E_("cell")^(0)-(0.0591)/(2)"log"(1)/([Br^(-)]^(2)[H^(+)]^(2))`
`therefore E_("cell")=(0-1.08)-0.02955 "log"(1)/((0.01)^(2)(0.03)^(2))`
`=-1.08-0.02955xx(7.0457)=-1.288V`
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