Permanganate ion can oxidize sulfite to sulfate in basic
solution as follows:
2 MnO4(aq) + 3 SO3(aq) + H2O(l) →
2 MnO2(s) + 3 SO4(aq) + 2 OH(aq)
Determine the potential for the reaction (Erxn) at 25°C when the concentrations of the reactants and products are
[MnO4]= 0.150 M,
[SO3] = 0.256 M,
[SO4]=0.178 M,
and [OH-] = 0.0100 M.
Will the
value of Erxn increase
or decrease as the reaction proceeds?