Consider the data below representing a run for the Clock Reaction. If the volumes of reagents indicated were combined and 219 seconds elapse before the color appears, calculate the rate of reaction in M/s.
0.50 mL 0.00050 M Na2S2O3
0.50 mL 0.010 M KI
0.50 mL 0.040 M KBrO3
0.25 mL 0.100 M HCl
0.75 mL DI H2O
1-2 drops 1% starch indicator (negligible volume)