What was the result of the experiment using dialysis tubing?
What was the result of the experiment using dialysis tubing?
It was concluded that the dialysis tubing doesn’t allow all kinds of substances to pass readily through the pores of its membrane. This means that it is selective in its permeability to substances. The dialysis tubing was permeable to glucose and iodine but not to starch.
What is the purpose of the dialysis tubing lab?
In this practical, dialysis tubing is used as a surrogate cell membrane for a visual demonstration of osmosis and diffusion. A solution containing large molecules (Starch) and small molecules (Glucose) is placed inside the tubing; which is then placed in a solution containing iodine.
How are you going to determine if iodine and or starch diffuse across the dialysis tubing?
How are you going to determine if iodine and/or starch diffuse across the dialysis tubing? – If both starch and iodine are able to diffuse across the dialysis tubing they would mix on both sides of the membrane turning both solutions dark purple.
Do you expect the water to diffuse into or out of the dialysis bag?
Water will diffuse into the bag because the inside of the bag has the highest water potential.
What can pass through a dialysis membrane?
The dialysis membrane is one of the critical components that determine dialysis performance. These membranes allow only low-molecular-weight molecules, such as sodium, potassium, urea, and creatinine, to pass through while blocking proteins, such as albumin, and other larger molecules.
What is your hypothesis for this experiment quizlet diffusion?
What is your hypothesis for this experiment? The greater the concentration gradient, the faster the diffusion rate.
Is dialysis tubing an effective model of a cell membrane?
The plasma membrane of a cell can be modeled various ways, but dialysis tubing is especially helpful to model what substances will diffuse or be transported out of a cell membrane.
Did your results while testing diffusion across a selectively permeable membrane support your hypothesis Why or why not?
Looking at your lab data for the selectively permeable membrane lab, do your results support your hypothesis? Why or why not? Yes, in the end, both Iodine and Glucose diffused across the plastic but Starch did not.
What happened to the iodine in the diffusion bag?
What happened to the iodine in the diffusion bag? It diffused out of the diffusion bag and into the beaker.
What would happen if you did an experiment where the iodine solution was placed in the dialysis bag and the starch solution was in the beaker?
If we did an experiment in which the iodine solution was placed in the baggie and the starch solution was in the breaker the iodine would move out the baggie. Once the iodine makes it way out the baggie the starch would change color.
