Predicating the spontaneity of cell reaction: Predict whether following reaction would s
Channel: Doubtnut
Date: 2020-08-23

Predicating the spontaneity of cell reaction: Predict whether following reaction would spontaneously as written at `298 K`:  `Co(s) + Fe^(2+)(aq.) rarr Co^(2+)(aq.) + Fe(s)`  given that `C_(Co^(2+)) = 0.15 M` and `C_(Fe^(2+)) = 0.68 M`  Strategy: Calculate `E_("cell")` by applying the Nernst equaltion to the overall cell reaction. The cell is spontaneous in the direction written, for the concentration given, if `E_("cell")` is positive. However the reverse reaction would be favoured at those concentrations, if resulting cell potential is negative.