Polarographic Study of Titanium Oxalato and Oxalatous Complex

[摘要] Reduction of Ti(¥³)-oxalate complex on dropping mercury electrode has been studied as a function of oxalate concentration and of pH varied with HCl. Assuming there are equilibrium TiO(C2O4)2= + 2H+ = Ti+4 + 2C2O4= + H2O K4 in addition to TiO(C2O4)2= = TiO++ + 2C2O4= K2 Ti(C2O4)2- = Ti+3 + 2C2O4= K3 in the system cathodic wave has been well explained for that pH is higher than 0.5. The equilibrium constants K2, K3 and K4 have been to be 2 ¡¿ 10-12, 5 ¡¿ 10-13 and 10-11, respectively. The reduction of Ti(¥³)-oxalate system is Ti+4 + e ¡æ Ti+3 in the concentration of hydrochloric acid, higher than 3M.

[学科分类] 化学（综合）