# how does concentration gradient affect the rate of diffusion

A solution with a low solute concentration has a high water concentration, and a high water potential. Experiment 1: Diffusion through a liquid 1. This lack of a concentration gradient in which there is no net movement of a substance is known as dynamic equilibrium. Pure water has the highest water potential. In other words diffusion occurs down the concentration gradient of the molecule in question . Higher concentration gradients will result in higher rates of diffusion. Method: The rate of simple diffusion can be expressed by a modification of Fick's Law for small, nonpolar molecules. A concentration gradient is considered negative when there are more molecules within the cell. How does the size of a solute affect the rate of diffusion? 2. Click to see full answer Consequently, how does the concentration gradient affect the rate of diffusion? Lab 6 Diffusion Name: As you complete the lab, answer the questions below, when completed save with your name and then attach to the Lab 6 drop box. In facilitated diffusion, the concentration gradient process is more complex. I hope this helps! The concentration gradient therefore represents the concept that, just as a ball rolls down a slope, during diffusion molecules move down the concentration gradient. As the molecules move the gradient evens out until equilibrium is reached. 2. Describe how a molecules move with respect to the concentration. If the medium is less dense, diffusion increases. Concentration: Diffusion of molecules is entirely dependent on moving from an area of higher concentration to an area of lower concentration. The rate of diffusion, dn/dt, is the change in the number of diffusing molecules inside the cell over time. 15. Extent of the concentration gradient: The greater the difference in concentration, the more rapid the diffusion.Lower temperatures decrease the energy of the molecules, thus decreasing the rate of diffusion.Solvent density: As the density of a solvent increases, the rate of diffusion decreases. Describe how a molecules move with respect to the concentration. The greater the concentration gradient the greater the rate of diffusion . Particle Size and Diffusion Rate. Question Lab 6 Diffusion Name: As you complete the lab, answer the questions below, when completed save with your name and then attach to the Lab 6 drop box. Particle size is one factor that affects the rate of diffusion. While diffusion will go forward in the presence of a concentration gradient of a substance, several factors affect the rate of diffusion: Extent of the concentration gradient: The greater the difference in concentration, the more rapid the diffusion. At a given temperature, smaller particles will move more quickly than larger particles. Diffusion of carbon dioxide from the cell to the blood stream will occur at a higher rate than when the concentration of carbon dioxide is at more normal levels. Increasing the solute's volume once the concentration is high does not alter the rate of diffusion. Experiment 1: Diffusion through a liquid 1. read more a. Diffusion is a process in which solute molecules when left to themselves in a solution move from a region of higher concentration to lower concentration, this eventually leads to uniform distribution of that solute molecule in that solution over a period of time. A concentration gradient affects the direction that solutes diffusion. A concentration gradient affects the direction that solutes diffusion. This is because facilitated diffusion requires carrier proteins, and there is a maximum number (Vmax) present. This means that the concentration gradient is positive. 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