Diffusion Experiment Procedures and Tools

The video tutorial demonstrates a diffusion experiment using agar plates. It begins with an introduction to the experiment and the importance of selecting the right agar plate. The materials required include a straw, ruler, sharpie, potassium permanganate, and methylene blue. The tutorial explains how to prepare the agar plate by creating wells, labeling them, and adding the substances. The experiment is repeated under different conditions to observe diffusion rates. Initial measurements are taken to track the diffusion process.

What is the primary purpose of using an agar plate in this experiment?

• To measure temperature

• To grow bacteria

• To observe mold growth

• To study diffusion

Why is it important to ensure the agar plate is free of mold?

• Mold can interfere with diffusion

• Mold can enhance diffusion

• Mold can change the color of the substances

• Mold can make the agar plate heavier

Which tools are necessary for preparing the agar plate?

• A knife and a spoon

• A ruler and a sharpie

• A thermometer and a beaker

• A pipette and a funnel

What are the two substances used in the diffusion experiment?

• Ethanol and acetone

• Hydrochloric acid and sodium hydroxide

• Potassium permanganate and methylene blue

• Sodium chloride and water

How are the wells created in the agar plate?

• Using a knife

• Using a straw

• Using a spoon

• Using a pipette

Why is it important to mark the wells on the agar plate?

• To prevent the agar from moving

• To identify the type of agar used

• To ensure accurate measurement

• To make the plate look organized

What is the significance of labeling the wells as A and B?

• To show the depth of the wells

• To differentiate between different experiments

• To avoid mixing up results

• To indicate the size of the wells

What should be done after adding the substances to the wells?

• Leave the lid off

• Shake the plate vigorously

• Place the plate in a refrigerator

• Put the lid back on and let it sit

What is the initial diameter measurement for well B?

• 0.9 centimeters

• 0.8 centimeters

• 0.7 centimeters

• 0.5 centimeters

What is the purpose of placing the agar plates in different environmental conditions?

• To investigate the effect on diffusion

• To observe the color change of the substances

• To measure the weight of the plates

• To test the durability of the agar