The Belousov-Zabotinsky Reaction

The best studied homogeneous oscillatory reaction involves the oxidation of propanedioic acid (PDA) by bromate in acidified bromide solution, catalysed by Ce(IV). The overall reaction is  

Reduction of bromate by bromide with the bromination of the acid  

Add 30 cm concentrated sulphuric acid slowly to 399 cm cooled water and dissolve in the solution 10 g propanedioic acid, 3.9 g potassium bromate and 0.4 g ammonium hexanitrocerate(IV). Add to the solution drops of 0.025 M ferroin indicator ( 14 cm ) to give a visible colour. Stir magnetically and note the change in colour from blue to red. Alternatively, insert a platinum electrode into the solution and dip a calomel electrode through a salt bridge in the solution. Connect the two electrodes to a mV meter and 

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