now the scientific concepts of hypotonic, isotonic, and hypertonic.
Hypothesis: For part 1 my hypothesis is: That the starch will diffuse across the plastic bag and react with the iodine and will have a color change to the water to imply the reaction happened.
For part 2 my hypothesis is: that the potatoes will be hypotonic in the sucrose solutions, while in water the potatoes and sweat potato will be isotonic. Also the sweat potato, will be hypotonic.
For part one the control group is the plain bowl with water, and then the independent variable is the permeability of the plastic bag, and the dependent variable is the change of color in the water.
Part 1: Cell Membrane and Permeability
1. Create a starch solution in a bowl or cup by one of the following methods:
• Option 1.
a. Add 1/4 cup cornstarch and 1/4 water into a bowl.
b. Stir to mix.
c. Add 1 to 1 1/2 cups very warm water (be very careful when working with hot water) and stir well.
• Option 2.
a. Boil a small potato in 2 cups of water
b. Mash the potato
c. After the potato cools, pour water over the mashed potato and strain the fibrous part out using a coffee filter.
d. Be sure to cool to room temperature to avoid adding temperature as a variable.
2. Add starch solution:
. Measure out 1 cup of the starch solution and pour carefully into one sandwich bag.
a. Zip lock the sandwich bags tightly to prevent leaks-leaving some air in the bag above the starch solution.
b. Test for leaks to ensure that…
something, and it had to be done immediately. He tried dressing as another star athlete. That did not work. He tried working out; jogging, lifting weights, running sprints. No success with that either. He even tried paying off his teammates so they would allow him to play. Of course, there was no chance at two plays with that strategy. Stikle was beginning to lose hope.
Two evenings later, on Friday night - the night in advance of gameday, Stikle sat down to a dinner of fried,…
When you think of a potato you think Yum!But ever wonder what the science behind
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observing the x-axis intersection of the lines in each graph to approximate the concentration value inside each cell when there is no change in mass, or when the solution is isotonic to the cell. The water potentials are different because the two cells do not consist of the same amount of solute. The concentration of the white potato cell was approximately .23 M of sucrose, while the sweet potato was .59 M of sucrose. While a white potato consists of some sucrose, the sweet potato consists of…
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