Diffusion Demo

Mr. Anderson explains the diffusion process, highlighting the movement of molecules from high to low concentration. He describes the components involved in the diffusion and osmosis lab, including starch, glucose, water, dialysis tubing, and Lugol's solution. The video demonstrates a diffusion experiment using dialysis tubing, where starch and glucose are placed inside, and water and Lugol's solution are outside. Observations include color changes and glucose presence, illustrating diffusion principles. The goal is to rank the components by size using diffusion understanding.

What is the primary cause of diffusion?

• Electrical currents

• Magnetic fields

• Molecular motion

• Gravitational pull

Which of the following is a polysaccharide?

• Glucose

• IKI

• Water

• Starch

What is the chemical formula for glucose?

• NaCl

• C6H12O6

• H2O

• C12H22O11

What is the role of Lugol's solution in the experiment?

• To dissolve glucose

• To indicate the presence of starch

• To seal the dialysis tubing

• To provide nutrients

What is placed inside the dialysis tubing at the start of the experiment?

• Lugol's solution and water

• Starch, glucose, and water

• Only glucose

• Only water

What change is observed in the beaker after 10 minutes?

• The color remains the same

• The color changes slightly

• The dialysis bag dissolves

• The beaker cracks

What is the result of the glucose test strip after the experiment?

• Negative inside and outside

• Negative inside, positive outside

• Positive inside and outside

• Positive inside, negative outside