Potato Osmosis Lab Write up
Introduction
- Explain the importance of water to the cell (60-90%, universal solvent, etc.)
- Explain the parts of a solution (solute & solvent) and what is meant by the solution’s concentration
- Discuss semipermeable cell membranes and osmosis
- Explain what determines direction of movement of water into and out of the cell (solute concentration inside & outside the cell, water potential, down the concentration gradient, etc.)
- Explain the effect of water loss and water gain on plant cells
Hypothesis
(write objective from lab.)
Materials
The materials used include …
Procedure
Day 1
Use a knife to … (No numbers; write in paragraph form)
Procedure
Day 2
Carefully remove the … (No numbers; write in paragraph form)
Results
Data Table
1. Did any of the …
answer
Conclusion
- Restate the hypothesis
- Discuss the original mass and original appearance of the potato cores
- Discuss the mass change (if any0 and flexibility of the cores after 24 hours in the solutions
- Explain the change of mass in each core telling WHY THE MASS CHANGE OCCURRED (movement of the water & in which direction & why it moved that way)
- Explain the change in flexibility of the cores (why were they stiffer or more flexible)
- Make a final statement about concentration gradient & movement of water across cell membranes