1.

For general redox reaction: aA+bB overset(n e^(-)) to cC=dD. Derive nernst equation.

Answer»

Solution :* If `E_(cell)`=cell POTENTIAL and `E_(cell)^(THETA)=`standard cell potential and [A], [B], [C] and [D] are the CONCENTRATION of A,B,C and D respectively, then the NERNST equation is as follows:
`E_(cell)=E_(cell)^(Theta)-(RT)/(nF)lnQ`
`therefore E_(cell)=E_(cell)^(Theta)-(RT)/(nF)ln([C]^(c)[D]^(d))/([A]^(a)[B]^(b))`
This formula can be written as under,
`E_(cell)=E_(cell)^(Theta)-(0.591)/(n)"log"_(10)([C]^(c)[D]^(d))/([A]^(a)[B]^(b))`
and `E_(cell)=E_(cell)^(Theta)-(2.303RT)/(nF)"log"_(10)([C]^(c)[D]^(d))/([A]^(a)[B]^(b))`


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