Membrane Bench — Permeability & Osmosis

Water movement into Side A

—

Press Run.

Membrane pore size5,000 Da

Put in Side A

0 / 30 min

Prediction table

Particle	Size (Da)	Result

Side A

particles

Side B

particles

Crossings so far

0 A → B

0 B → A

Press Start.

Molecule crossing the membrane

Proteins in the membrane

Particles starting on Side A 32

Particles on each side over time

Both lines flatten when the sides are even — but watch the crossing counters keep climbing.

Inside the cell

10.0%

24 particles — unchanged

Solution outside

4.0%

13 particles — unchanged

Solute inside the cell10%

Solute in the solution4%

0 / 30 min

Mass readingHYPOTONIC

Start

4.00 g

Now

4.00 g

Change

0.0%

Press Run to collect a reading.

Data table

No trials yet. Run several solution concentrations and record each one to find the isotonic point.

Percent change vs. solution concentration

Record at least two trials to draw the line of best fit.