BIO210L Lab 4 Diffusion and Osmosis[ ALL ANSWERS 100% CORRECT] PRE LAB Q&A

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Lab 4 Diffusion and Osmosis BIO201L Student Name: Latoya Tulloch Access Code (located on the lid of your lab kit): AC-7JYMXQH Pre-Lab Questions: ”1. Compare and contrast diffusion and osmosis.”... Diffusion is the process by which solute molecules moves along an electrochemical gradient from region of high concentration to region of low concentration while osmosis is the process where solute molecules moves through a semi permeable membrane from lowly concentrated region to high concentrated region ”2. What is the water potential of an open beaker containing pure water? ” The potential is zero ”3. Why don’t red blood cells swell or shrink in blood? ” They do not swell because the internal body environment is isotonic in nature, implying that the internal environment of the red blood cells and the external environment are at equilibrium thus no net movement of water in to the cells Experiment 1: Diffusion through a Liquid Table 1: Rate of Diffusion in Corn Syrup Time (sec) Blue Dye Red Dye 10 1.5 1.9 20 1.8 2.0 30 2.0 2.2 40 2.1 2.3 50 2.2 2.4 60 2.3 2.6 70 2.4 2.8 80 2.5 3.0 90 2.5 3.0 Lab 4 Diffusion and Osmosis BIO201L Time (sec) Blue Dye Red Dye 100 2.6 3.0 110 2.6 3.0 120 2.6 3.0 Table 2: Speed of Diffusion of Different Molecular Weight Dyes Structure Molecular Weight Total Distance Traveled (mm) Speed of Diffusion (mm/hr)* Blue Dye 793 23 690 Red Dye 496 26 780 *To get the hourly diffusion rate, multiply the total distance diffused by 30. Post-Lab Questions ” 1. Examine the plot below. How well does it match the data you took in Table 1? ” Lab 4 Diffusion and Osmosis BIO201L The table match the data taken from table 1 [Show More]

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