Gummy Bear Lab - Lab Report

Gummy Bear Lab - Lab Report - 2. Place the gummy bear in...

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Diffusion Lab Mitchell T. Heaton Introduction: This is a very basic lab that helps clarify the concepts of diffusion and osmosis. Diffusion is the tendency for molecules to spread out evenly into the available space. Osmosis is the diffusion of water across a selectively permeable membrane. These concepts will be shown using the elementary example of water and gummy bears. These familiar materials should help show the concepts universality in the biological world and develop an improved understanding of diffusion and osmosis. Objective: To show the diffusion of water across the membrane through an increase of mass and size. Hypothesis: The gummy bear will become distorted and enlarged approximately twice its original size. Materials: 1 Gummy bear 1 Dixie Cup 1 Piece of glad wrap 1 Ruler 1 Scale 20 mL of water Methods: 1. Take your gummy bear and make various measurements including length, height, and width. Find your gummy bear’s mass in grams.
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Unformatted text preview: 2. Place the gummy bear in the Dixie cup and then fill it with approximately 20 mL of water (about full). Cover the Dixie cup with glad wrap so that no water can evaporate. 3. Store the gummy bear in a dark area (so that water does not become gaseous) at room temperature and let sit for approximately 24 hours. 4. After 24 hours, remove the water and gummy bear from the Dixie cup. Repeat step 1 with the gummy bear. 5. Observe the change from the initial size of the gummy bear to its current size. Results: Original Gummy Bear Gummy Bear after 24 hours in water Length Width Height Mass Diffusion Lab Mitchell T. Heaton Conclusion: What do you suppose would have happened if the gummy bear spent less time submerged in the water? Would there be a point when the gummy bear had absorbed all the water in the cup? Explain. Which measurement best shows the effect of diffusion that occurred within the Dixie cup? Why?...
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Gummy Bear Lab - Lab Report - 2. Place the gummy bear in...

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