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Diffusion Essays

Cell Transport Mechanisms and Permeability Argumentative

1.Describe two variables that affect the rate of diffusion. Size of material and concentration 2.Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? The molecules were too large to pass through. This is what …

Diffusion in Gases

-Liquid bromine was placed in a jar and covered Observations: When first placed in the jar the original color of bromine was red-brown. As it began to diffuse its color changed from dark brown to a lighter brown until it becomes a yellow-like orange color. As it was diffusing liquid …

The Effect of Varying Molecular Weights on the Rate of Diffusion

The effect of molecular weight on the rate of diffusion was verified by the 2 tests: the glass tube setup and the water agar-gel setup. In the glass tube setup, two cotton balls were soaked in the solutions of hydrochloric acid (HCl) and ammonium hydroxide (NH4OH) and were simultaneously placed …

Anatomy and Phys Study

1.Describe two variables that affect the rate of diffusion. 2.Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? 3.Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. …

Gaseous Diffusion Coefficient

Introduction The knowledge of physical and chemical properties of certain materials is important because very often process engineering deal with the transformation and distribution of these materials in bulk. One such property is diffusivity. Theory When a concentration gradient exists within a fluid consisting of two or more components, there …

IIC-Kelly Case

In this case, Kelly is the most oldest of the four children. Her family is on low hierarchy in the society. She is viewed of having some problems among Intra- and Interpersonal Competencies. I found three main problems through my researches on the case and i am going to discuss …

The effect of temperature on the cell membrane of a beetroot

Aim In this experiment I will be testing the effect of temperature on the plasma membrane of a beetroot. I will do this by measuring the percentage light transmission using a spectrophotometer. Once I have obtained my results, I will justify them using scientific knowledge explaining what I have observed …

Osmosis and Diffusion Lab

The purpose of this lab was to observe the rate of osmosis and diffusion, as well as the effect of molecular size of the particles on this rate. Part I of the lab was a demonstration of osmosis and diffusion, that dealt with raisins in different liquid environments, each with …

Osmosis in potato cells

1.0 Abstract This experiment’s ultimate goal is to find the water potential of the potato cell. This was achieved through placing potato cores in different concentrations of sucrose (0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 2.0%, 3.0% and 4.0%) solution and to observe how much water was gained or lost through osmosis …

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