The following results were obtained from the acid-catalysed reaction between iodine, \( I_2 \), and propanone, \( CH_3COCH_3 \).
Experiment 1: \( [CH_3COCH_3] = 0.56 \), \( [I_2] = 0.56 \), \( [H^+] = 0.56 \), Rate = \( 5.6\times 10^{-3} \)
Experiment 2: \( [CH_3COCH_3] = 0.28 \), \( [I_2] = 0.56 \), \( [H^+] = 0.28 \), Rate = \( 1.4\times 10^{-3} \)
Experiment 3: \( [CH_3COCH_3] = 0.56 \), \( [I_2] = 0.28 \), \( [H^+] = 0.56 \), Rate = \( 5.6\times 10^{-3} \)
Experiment 4: \( [CH_3COCH_3] = 0.56 \), \( [I_2] = 0.56 \), \( [H^+] = 0.28 \), Rate = \( 2.8\times 10^{-3} \)
(All concentrations in \( mol \, dm^{-3} \), rate in \( mol \, dm^{-3}s^{-1} \)).
What is the correct order of reaction for each reactant?