Kinetics of Reduction of Silver(II) by Sodium Tetrahydroborate

Article abstract of DOI:10.1246/bcsj.61.4133

The kinetics of reduction of silver(II) by sodium tetrahydroborate in aqueous acidic solution has been investigated.The reaction was observed to proceed in two steps, namely, (a) the formation of the intermediate Ag^I and (b) the subsequent conversion of Ag^I to Ag⁰.The activation parameters for the two steps have been separately calculated.The intermediate Ag^I species, and the final products, were characterized by chemical and spectral methods.A plausible mechanism for the reduction of Ag^II ions has been proposed.