Diffusion Lab Experiments
1. Drop of water on a slide, add particles of Carmin to the water. Add cover and observe under Microscope.
2. https://www.youtube.com/watch?v=aTn56X_fa7Y
3. Working with Membranes.
Solution
Source
Original
Contents
(Beaker and Bag)
Original Color
Final Color
(Beaker and Bag)
Color After Benedict´s Test (Tubes)
Bag
30% Glucose and Starch
No color,
Chalky
Purple
Orange-Red
Beaker
H2O and I2KI(Lugol)
Pale Yellow
Pale Yellow
Orange-Red
Control
H2O
–-
Blue
Note
Lugols Iodine (Yellow Amber) reacts with Starch and turns Purple or Black
Benedict (Blue) reacts with Glucose (Solution heated) turns Orange, or Orange_Red
Indicator
Color
Reacts with
Turns
Lugols Iodine
Yellow Amber
Starch
Purple or Black
Benedict
Blue
Glucose
Orange
Biuret
Blue
Peptides
Violet

4. Osmotic activity in cells.

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