A kinetic study of the of oxidation of octacyanotungstate(IV) by bromate

Abstract

The kinetics of the oxidation of octacyanotungstate(IV) by bromate have been studied in acidic perchlorate solutions at different temperatures and 0.50 M ionic strength. The reaction is partially autocatalytic. The kinetics of the uncatalyzed pathway follows the rate law; $$ - d[W(CN)_8^{4 - } ]/dt = 6(k_0 + k_1 [H^ + ]^2 )[BrO_3^ - ][W(CN)_8^{4 - } ]$$ where k0=1.5×10−3 M−1 sec−1 and k1=9.6×10−2 M−2 sec−1 at 25 °C