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Calculate the Standard Reduction potential of Substance B when e = -0.62 V at 25 °C;...

Calculate the Standard Reduction potential of Substance B when e = -0.62 V at 25 °C; [Breduced] = 50 µM, and [Boxidized] = 2 µM. Assume that n = 2.

Solutions

Expert Solution

Ecell     = E0cell -RT/nF lnKeq

             = E0cell -2.303RT/nF log[reduced form]/[oxidized form]

    R       = 8.314Joulemole-K

    T      25+273 = 298K

    F = 96500c

Ecell = E0cell - 2.303*8.314*298/n*96500 log[reduced form]/[oxidized form]

Ecell    = E0cell - 0.0592/n log[reduced form]/[oxidized form]

   n         = 2

Ecell    = -0.62v

[Breduced] = 50 µM, and [Boxidized] = 2 µM

-0.62 = E0cell - 0.0592/2 log50/2

-0.62    = E0cell -0.0296*1.3979

   E0cell   = -0.58v

queen_honey_blossom answered 2 years ago
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