Consider the data below representing a run for the clock

Question

Consider the data below representing a run for the Clock Reaction you'll be performing in lab. Calculate the rate of reaction in M/s if the volumes of reagents indicated are combined and 219 seconds elapse before the color appears.

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)

A) 2.3 x 10^-6 M/s

B) 9.1 x 10^-7 M/s

C) 4.6 x 10^-7 M/s

D) 3.8 x 10^-7 M/s

E) 7.6 x 10^-8 M/s