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When demonstrating osmosis: 1 - Leaving Cert Biology - Question ii - 2013
Question ii
When demonstrating osmosis: 1. For what purpose did you use Visking tubing, potato tissue or some similar material? 2. At the end of the demonstration, how did you... show full transcript
Worked Solution & Example Answer:When demonstrating osmosis: 1 - Leaving Cert Biology - Question ii - 2013
Step 1
For what purpose did you use Visking tubing, potato tissue or some similar material?
Answer
Visking tubing, potato tissue, or similar materials were used as a selectively permeable membrane. This allows certain molecules, such as water, to pass through while restricting others, which is essential for demonstrating the process of osmosis.
Step 2
At the end of the demonstration, how did you conclude that osmosis had occurred?
Answer
At the conclusion of the demonstration, osmosis can be confirmed by observing a change in mass or volume of the potato tissue or the fluid within the Visking tubing. An increase or decrease in mass indicates that water has moved into or out of the material, respectively, thereby demonstrating the movement of water across a semipermeable membrane.