Diffusion

Selectively Permeable Membrane

Animal Cell (Normal Saline 0.9%)

Diffusion experiment Methylene blue MW 320g/mole Potassium permagnate MW 150 g/mole Form Hypothesis T 0 initial diameter T 60 final diameter Activity 1 Room temp Calc. rate of diffusion

TimeMB RTMB FRPP RTPP FR T010 mm T6020 mm 10 mm/hr Table 1. Rate of Diffusion in Methylene Blue vs Potassium Permagnate at Room Temp and Fridge

Table 2. Rate of Diffusion in Methylene Blue vs Potassium Permagnate at Room Temp and Fridge Group Data GroupMB RTMB FRPP RTPP FR 110mm/hr3 mm/hr Ave SD

Create 4 dialysis bags, filled with unknown concentration sucrose solutions (10 ml) Weigh bags and then immerse in 10% sucrose solution (50 ml) Reweigh bags after 30 minutes of experiment Identify the bags containing 0%,10%, 20%, and 40% of sucrose, based on weight changes. Activity 2 Osmosis through semipermeable membrane

Unknown solutions of sucrose (0, 10, 20 & 40 %)

Dialysis Tubing

Weigh pre and post

50 ml 10% sucrose Unknown solution (10ml) (0, 10, 20 & 40 % sucrose solution) 30 minutes

Potato Osmosis Experiment Activity 3 10% sucrose 60 minutes