Diffusion Test
...eight. The molecular weight was 893.7. I did the same thing with the rest five dyes, and the measurements showed the following weights: 339.3, 576.4, 601.2, 190.9, and 143.7. As one can see, the molecular weight, and therefore the size too, of each dye differed from others. Since diffusion is a natural process that does not require external stimulation, the dyes started to liberate their cells into the air at once. However the rates of diffusion were not the same. In the next experiment I have computed the weight of an unknown dye using the diffusion rate. I pretended as though I do not know the results from the previous experiment, and assigned one dye as unknown. I have put some of it as in the first experiment into the hole in the plate, and then gradually put drops of other “known” dyes into corresponding holes. Then after a while, when all the dyes have diffused, I measured the diameter of each drop of dye with a ruler and recorded the data. Since the rates of diffusion of all six dyes differ, the diameters were also different: 0.08, 0.25, 0.5, 0.1, 0.11, 0.5. The diameter of the diffused drop of unknown dye equaled 0.11. Next experiment showed the way temperature affects diffusion process. I have placed the dyes again in the agar plate, each into different hole. I set the temperature as high as 40 degrees Celsius. Then I watched how all six dyes diffused, but I stopped at a certain point. The diffusion lasted for twenty-five seconds. Afterwards I repeated the experiment, but only next time I set the temperature to 15 degrees Celsius. Again the diffusion process lasted only twenty-five seconds, but the results in two temperature experiments differed. Results: It turned out that dyes with lower molecular weight diffused faster, while...