Day 1

Do Now

• Do now• Lab purpose discussion• Procedure for Part 1• Post-lab questions 1, 2, & 3

Agenda

• Write two sentences describing the purpose of this lab.

Learning Objectives: SWBAT• Make observations about reactions of sodium

alginate• Explain observed color changes based on pH

Quick Review

• What is nanotechnology?• What are some potential uses for

nanotechnology?

New cancer treatments can use nanoparticles with encapsulated drugs.

• Why are targeted cancer treatments desirable?

• What are some ways to create targeted treatments?

Sodium Alginate

We have all eaten sodium alginate!

Encapsulation in Sodium Alginate

• Why do spheres form when we add a solution containing sodium alginate to a solution of calcium chloride?

• Are these nanoparticles?

What are we encapsulating in sodium alginate?

Part 1• Congo red• Bromophenol bluePart 2• Iodine-potassium iodide• Starch

Acid-Base Indicators

• What are acid/base indicators used for?

Acid-Base Indicator

Lower pH Color

pH Range of Color Change

Higher pH Color

Congo red Blue 3.0 – 5.0 Red

Bromophenol blue

Yellow 3.0 – 4.6 Purple

Part

1

• Do now• Lab purpose discussion• Procedure for Part 1• Post-lab questions 1, 2, & 3

Agenda

Learning Objectives: SWBAT• Make observations about reactions of sodium

alginate• Explain observed color changes based on pH

Day 2

Do Now

• Do now• Procedure for Part 2• Finish post-lab questions• Discussion

Agenda

• Write two things you learned yesterday and two questions you have

Learning Objectives: SWBAT• Explain observed color changes based on the

reaction of starch and iodine and diffusion properties

• Relate encapsulation of materials in sodium alginate spheres to current scientific research

What happens when starch mixes with iodine?

ApplePotato

Part

2

Agenda

Learning Objectives: SWBAT• Explain observed color changes based on the

reaction of starch and iodine• Relate encapsulation of chemicals in sodium

alginate spheres to current scientific research

• Do now• Procedure for Part 2• Finish post-lab questions• Discussion