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Table 1: Rate of Diffusion in Corn Syrup Time (sec)Blue DyeRed DyeTime (sec)Blue DyeRed Dye10 70 20 80 30 90 40 100 50 110 60 120 Table 2: Speed of Diffusion of D
Table 1: Rate of Diffusion in Corn Syrup
Time (sec)
Blue Dye
Red Dye
Time (sec)
Blue Dye
Red Dye
10
70
20
80
30
90
40
100
50
110
60
120
Table 2: Speed of Diffusion of Different Molecular Weight Dyes
Structure
Molecular Weight
Total Distance Traveled (mm)
Speed of Diffusion (mm/hr)*
Blue Dye
Red Dye
*Multiply the total distance diffused by 30 to get the hourly diffusion rate
Insert the photos of the blue dye in corn syrup and red dye in corn syrup after the 10 minutes allowed for diffusion. The boxes will change shape to fit the photos.
Blue dye
Red dye
Complete questions on the next page.
Post-Lab Questions
1. Examine the plot below. How well does it match the data you took in Table 2? If there are differences please describe these.
2. Which dye diffused the fastest?
3. Does the rate of diffusion correspond with the molecular weight of the dye?
4. Does the rate of diffusion change over time? Why or why not?
