B-Z CHEMICAL OSCILLATION IN PERCHLORIC-ACID MEDIUM WITH GALLIC ACID AS THE SUBSTRATE

B-Z oscillating chemical reaction has been studied using gallic acid a s the substrate in a new acid medium, namely, perchloric acid medium, both visually and potentiometrically side by side by batch method. Var ious concentrations of perchloric acid have been used and both uncatal ysed and catalysed reactions using ferroin have been studied. The reac tion has also been followed in presence of different amounts of aceton e. The resulting changes in oscillation parameters have been analysed in each cast. Studies at different temperatures have led to the determ ination of apparent values of E(a), Delta H-double dagger and Delta S- double dagger.