ChloriteIodideMalonic Acid (CIMA) Reaction
ChloriteIodideMalonic Acid (CIMA) Reaction
The Demonstration presents the chloriteiodidemalonic acid (CIMA) reaction, which gives rise to temporal oscillations.
The reaction scheme is:
A→X
X→Y
4X+Y→P
where and .
X=

I
Y=

ClO
2
The dimensionless governing equations are:
u
τ
2
u
v
τ
2
u
Oscillating patterns are observed for . In fact, oscillations are obtained in snapshot 1 for and . The phaseplane diagram shows a limit cycle.
b<
3a
5
25
a
b=11.4655
a=37.4828
On the other hand, a stable steady state is found for and (snapshot 3). Phaseplane analysis shows a stable node. The locations of the selected parameter values are plotted in the stability diagram that demarcates the parameter space between limit cycles (periodic oscillations) and damped oscillations.
a=21.7989
b=15.7884