Question

Please help

calculate k_ab for the reaction A^2-+B^3- --> A^3- + B^2-

for self exchange of A E^o=0.68V and k_aa =7.4x10²

for self exchange of B E⁰=0.54V and k_bb=7x10⁴

E⁰_cell=E^ocathode-E^oAnode

K₁₂=e^{-(-nFEcell/RT)} F=96500

use marcus relationship k_ab=(k_abk_bbK_ab)^1/2