Gallery: Honors Chemistry Iodine Clock Lab

Honors Chemistry teacher, Susan Hallstrom, conducted a lab for her 3rd and 6th hour Honors Chemistry classes. The Iodine Clock Reaction happens by mixing two solutions provided by the teacher, solution A and solution B. To perform the lab, students carefully measured 5.0 mL of solution A and 5.0 mL of solution B in separate test tubes. Then, the students mixed the solution back and forth between test tubes 3 times, while starting a timer when the first pour occurs. The timer was quickly stopped when the solution instantly turned to a dark blue color. These steps were repeated 4 more times, each time subtracting 1 mL of solution B and replacing it will distilled water. In each trial the time it took for the solutions to turn blue increased as it was diluted with more water.

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4.14.22 Honors Chemistry Iodine Clock Lab