Diffusion Lab

Diffusion problems in the laboratory Starch, water, glucose, iodine, or a combination of these may diffuse through the membrane of the dialysis bag and cause the bag to swell or contract. Hypothesis and strategy I believe that small molecules such as glucose and water diffuse through the membrane of the dialysis bag and it swells due to the concentration gradient. I test this hypothesis by filling the bag with a solution of water, dextrose and starch, tightening and weighing.

"The teacher knows that we can apply for a lot of grants, but in subsidies we usually need to replace strawberries and alcohol used in DNA extraction laboratories, eggs used in penetration laboratories and diffusion laboratories We need to purchase what is available "Kayton said," This is why teachers pay for themselves. "" You are talking about high school and junior high school students, "Kaiton said Said. "Even if you purchase beakers and test tubes, glassware is not always there.The glassware has an expiration date and needs to be included in the budget.

The purpose of this experiment was to observe the physical effects of penetration and diffusion and to determine whether it really happened. We assume that the mass of the dialysis tube increases as the molecule diffuses along the concentration gradient and we believe that as the molar concentration increases the rate of mass change also increases. Assumption: 1. Pour 100 ml of the specified solution into the beaker. Cut the potatoes in the form of french fries or tubes in quarters. 4 Determine the quality of the potato cylinder and record it. Put the cylinder in the beaker together with the specified solution and cover with lap. One night. Remove the cylinder from the beaker and carefully dry it. The room temperature was recorded in degrees centigrade. Determine and record the quality of 4 potato cylinders

The purpose of this experiment was to observe the penetration rate and diffusion rate, as well as the effect of particle size on this rate. The first part of the experiment is proof of penetration and diffusion. This includes raisins in various liquid environments, each containing different concentrations of sugar. In the fourth part of the laboratory, we use the same idea as the demonstration to place objects in various concentrations of substances, but Elodea leaves brine in this case. In both cases, objects with high concentration of substances are removed from the water. However, if the concentration of sugar or salt is very low or not at all, the object will not lose moisture, but in the case of raisins the excess moisture will be saturated. The second part of the experiment included how the penetration rate and molecular size affected it. The third part of the experiment is to observe the effect of molecular size on diffusion rate.