Today in class, we did the Diffusion Lab, a lab activity observing how the cell plasma membrane in a cell works. We first make a corn starch mixture with a teaspoon of corn starch and a half a cup of water in a plastic baggie. Then, iodine was added to a beaker with water and the baggie was submerged into the mixture. What was suppose to happen didn't: iodine entering the baggie and tinting the corn starch purple. The starch turned a slight shade of purple on the bottom when more iodine was added, but overall, the lab didn't work as expected.
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