~ Mansi Patel, Vivian Scalici, Tania Tobia, Maryam Oct. rd hour, AP Biology AP Lab Diffusion and Osmosis Essay Given six liquids with unknown molarities, we filled the dialysis tubing with different concentrated molar solutions. The dialysis tubing acted as a cell membrane demonstrating permeability with water and sucrose. Solute potential. The solute potential Ψ s, also called osmotic potential, is negative in a plant cell and zero in distilled water. Typical values ​​for the cell cytoplasm are -0 · 1. Solutes reduce the water potential resulting in a negative Ψ w while consuming some of the potential energy available in the water. Solute molecules can dissolve into