Ask an Expert: Diffusion and Osmosis Experiment

I am working on group science projects through Innovation Nation, and we asked a few questions about the basics of the project. In one experiment, we briefly explained how diffusion is affected by the temperature of the substance in which it enters. In our experiment we were taking two cups containing the same amount of water, but one was hot and the other was cold so we dropped the dye there and observed the diffusion rate of the dye.

Our question is as follows. What do you think is the best way to measure the amount of diffused dye for 5 minutes in 30 seconds? Our program recommends that you record a round percentage (10%, 20%, 30%, etc.) every 30 seconds, but I do not know if this is the most effective way. Thank you

This is a very good question. When it says to use a percentage ... the explanation refers to the best guess of how much dye diffusion you have. If you do this, I encourage you to do both cold hot water and hot water so that you can compare the spreading factor between them.

Another possibility is to soak a white strip in the water. Dyes are absorbed into it, and you can compare strips side-by-side. This will give you more specific information to display and compare. You can create a gradation before you begin your 0 - 10 marking experience. 0 means no pigment is added, and 10 means the maximum added amount of pigment. You can gradually add grades 2 to 9 by adding more dyes to the water and placing the test strips until you reach the maximum amount (10). Next, while experimenting, determine the level gradient (0 - 10) of each side you are testing. If you dry the sample strip, make sure that you can dry the test strip and make a fair comparison. In order to measure diffusion, you may want to have a specific distance point, and you can test the water with the added dye strip. It may be easier to work with a large surface area where the dye moves horizontally, so you can separate a test strip (like a bowl) or a baking sheet that makes the cake. Adding dye to one end of the plate allows you to measure the test point at 1 inch (cm / cm or any size container) away from the dye. These same spots were tested at each time interval. What you should see is that the test strip will contain more and more dyes over time.

Penetration: Permeation is the diffusion of water through its semipermeable membrane along its concentration gradient. If the membrane is permeable to water but does not pass through the solute, the water will equilibrate its concentration by diffusing to the side of the lower water concentration (and thus the higher solute concentration). In the left beaker, the solution on the right side of the membrane is hypertonic. Active (energy required) transport is the transfer of energy through membranes with adenosine triphosphate (ATP) compared to passive transport. Energy is consumed to help the material move through the membrane in the opposite direction from its concentration gradient. Active transport can be carried out with the help of protein pumps or by using vesicles. Another form of this transport is endocytosis, where cells use their cell membranes to encapsulate extracellular material. Exocytosis

Diffusion and penetration are an example of passive transport. Passive transport is the movement of matter through the permeable membrane without increasing energy. The difference between penetration and diffusion is that diffusion can occur without a membrane whereas permeation occurs only on semipermeable membranes. The infiltration involves only the migration of water through the permeable membrane. Penetration is much slower than diffusion rate. Penetration is passive transport of water and diffusion is passive transport of solute.

The laboratory called diffusion and penetration mainly develops diffusion of cell membranes and a method in which substances move and concentrate and diffuse. Both diffusion and invasion are a form of movement and are part of passive transport of cell membranes. Diffusion is the movement of solute from high concentration region to low concentration region. Water diffuses through the cell membrane. Invasion, in particular movement of water through the membrane. This means that they do not require energy or pump, as both penetration and diffusion are part of passive transport. Various environments are occurring due to proliferation. It has low permeability, high permeability and isotonic environment. Hypotonicity is when the solution has a lower solute concentration than water potential. The hypertonic solution has high solute concentration and low moisture potential. In our laboratory we are using a hospital program to simulate diffusion and invasion