Chem 40 – Theme 4 | Exploring uses of redox reactions 

Preamble

Oxidation Reduction stain remover design

Introduction:

When fabric is stained by tea, wine, or coffee, we are quick to use a stain remover to remove the stain. But what exactly is going on at the molecular level when these stains are removed? How do stain removers work? What types of stains are there?

Stain removers utilize the oxidation power of oxidizing agents which cause the molecule giving the stained color to lose electrons changing it to a colourless form.

In this project, you are to design your own stain remover, design and test your stain remover based on its effectiveness based on 2 different variables, and to report your observations on a formal scientific poster. The variables can be concentration, temperature, volume, types of chemicals, etc…

Project Outline

Oxidation Reduction stain remover design

Introduction:

When fabric is stained by tea, wine, or coffee, we are quick to use a stain remover to remove the stain. But what exactly is going on at the molecular level when these stains are removed? How do stain removers work? What types of stains are there?

Stain removers utilize the oxidation power of oxidizing agents which cause the molecule giving the stained color to lose electrons changing it to a colourless form.

In this project, you are to design your own stain remover, design and test your stain remover based on its effectiveness based on 2 different variables, and to report your observations on a formal scientific poster. The variables can be concentration, temperature, volume, types of chemicals, etc…

What you need to learn

 

Specific Outcomes

  1. Explain reduction and oxidation reactions in terms of electron movements (C12-01-08)
  2. Determining oxidation numbers for atoms in compounds and ions (C12-01-09)
  3. Identify reactions as redox or non-redox (C12-01-10) 
  4. Balance redox reactions  (C12-01-11)
  5. Practical uses of redox reactions (C12-01-12) 
  6. Define reaction rate  (C12-03-01)
  7. Identify variables to monitor reaction rates (C12-03-02)
  8. Factors that affect reaction rates (C12-03-05)
  9. What happens when a reaction occurs using Collision Theory?  (C12-03-06)
  10. Draw Potential Energy diagrams of a reaction ( C12-03-07)
  11. Calculating Rate Law

How you are assessed

Deliverables

  • Formal  group poster on your stain remover
  • Poster presentation 
  • Individual lab portfolios
  • Weekly Quizzes

Schedule 

Schedule

  • Bench mark point December 12th
  • Presentation December 18th & 19th

Tutorial Videos

Watch these to help and guide you along. You are expected to watch all of these videos and complete the workbook required. 

1. Assignment oxidation numbers https://www.youtube.com/watch?v=aWwuADRsSu4

2. Identifying redox reactions  https://youtu.be/acN6iibCGo8

3. Balancing with oxidation numbers: https://youtu.be/Z2RmsQFsHOA

4. Rate Law: https://youtu.be/6j_12SWrH2c

5. Another example with Rate Law: https://youtu.be/DXFwSzW_uRQ

6. Reaction mechanism: https://youtu.be/blARUaWpd48

7. Potential Energy Curves: https://youtu.be/_uiCWDcBejg

 

Other notes

Notes:

 

Worksheets:

Review: