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Diffusion control is more likely in solution where diffusion of reactants is slower due to the greater number of collisions with solvent molecules. Reactions where the activated complex forms easily and the products form rapidly are most likely to be limited by diffusion control.
Study with Quizlet and memorize flashcards containing terms like A concentration gradient affects the direction that solutes diffuse. Describe how molecules move with respect to the concentration., How does the size of a solute molecule affect the rate of diffusion? Do larger molecules diffuse faster or slower? How does the polarity of charge of a solute molecule affect diffusion across a ...
Nov 13, 2023 · We review the milestones in the century-long development of the theory of diffusion-controlled reactions. Starting from the seminal work by von Smoluchowski, who recognized the importance of diffusion in chemical reactions, we discuss perfect and imperfect surface reactions, their microscopic origins, and the underlying mathematical framework. Single-molecule reaction schemes, anomalous bulk ...
1. Obtain a soaked dialysis tubed. 2. Fold one end; tie securely. 3. Add appropriate contents. The dialysis tubing that serves as a model for the cell membrane in this question is permeable to water, but impermeable to solute. Please drag and drop the correct description of what will happen to the correct model cell. 1.
Jul 13, 2023 · Dimensional analysis of Fick's 1st Law (Equation 11.2.1) shows that the units of D are cm 2 /s which gives the number (dimensionless) of molecules crossing a 1 cm 2 surface area of membrane each second. J = moles/area/sec = mol/cm 2. s = - (cm 2 /s) mol/cm 3 /cm. Hence the units of D are cm 2 /s.
Jul 14, 2023 · Each individual reaction, which is called an elementary reaction, involves one, two, or (rarely) three atoms, molecules, or ions. The overall sequence of elementary reactions is the mechanism of the reaction. The sum of the individual steps, or elementary reactions, in the mechanism must give the balanced chemical equation for the overall reaction.
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Describe how diffusion occurs at the atomic level, and identify factors which affect the rate. Use Fick’s first and second laws to solve common diffusion problems. For a given system, identify some method(s) to increase or decrease the diffusion rate, without adversely affecting other material properties of interest.
