A gelatin dessert mixed according to the

A gelatin dessert mixed according to the manufacturer’s instructions Is added to approximately 9 cm (3.5 in.) of the liquid to glass and allowed to harden in a refrigerator. 3 After the gelatin hardens, remove it from the refrigerator and place it in an area where it will not be disturbed for several hours. 4 Add approximately 9 cm of water to a second glass and place it next to the glass containing the gelatin. 5 Both glasses should remain undisturbed for approximately 2 hours so that they are at room temperature when the experiment begins. 6 When the water and gelatin are at room temperature, carefully place one drop of food coloring on the surface of the water and another drop on the surface of the gelatin. The drops should be located in the center of the glasses. 7 To prevent the gelatin from drying, cover the glass containing the gelatin with plastic wrap and secure the plastic wrap with a rubber band. This is necessary because the experiment may take more than one day. 8 Record the amount of time that it takes for the color to diffuse throughout the water. 9. Allow the gelatin to remain undisturbed, checking it at least daily for 3 days, observing the pattern of diffusion. For each observation, record the diameter and depth of the diffused spot and estimate the percentage of gelatin that contained diffused food coloring. 10 In which glass (treatment) does diffusion occur the fastest? 11 Which of your hypotheses is supported by your observations? 12 Use the key terms from this lesson to describe the effect of medium (Jell-O/water) on the rate of diffusion. 13 How does the rate of diffusion in gelatin at room temperature compare with the rate of diffusion in water at the same temperature?

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