Osmosis Flashcards
What plant tissue is used in the osmosis practical?
Potato
Why is it important for the potato samples to have the same diameter?
To allow for easier comparison of results
Why is the potato skin removed from the cylinders?
It is impermeable to water
What process is being investigated in this experiment?
Water moving into or out of cells
What length are the potato cylinders cut to?
Three centimeters
What two measurements are taken for each potato cylinder?
Length and mass
What piece of equipment is used to measure the mass of the potato cylinders?
Top pan balance
What is the first solution used in the boiling tube?
Distilled water
How much distilled water is added to the boiling tube
10 millilitres
Why are different concentrations of sucrose used?
To observe their effects on the potato
How long are the potato samples left in the solutions for?
24 hours
Why is excess water removed from the potato cylinder?
To prevent it affecting the results
After being in distilled water, what length did the potato cylinder increase to?
32 millimeters
What calculation is needed after the experiment?
Calculate differences in mass and length
What is osmosis?
The movement of water through a semipermeable membrane
