Catalysts

This is available as a worksheet

The following reaction is between peroxydisulphate and iodide ions.
What is the catalyst in the reaction?
What is the mechanism for the reaction?
Why does the reaction proceed very slowly is no catalyst is added?
Peroxydisulphate and Iodide, Catalysed by Iron II Detailed Mechanism.mp4 ·⁴
Peroxydisulphate and Iodide, Catalysed by Iron II Video and Questions

Write out the equation for the following reaction, including states.
What kind of catalysis is this? Why?
Catalysis H₂S SO₂ -> Sulphur Catalyzed by Water.mp4

Illustrate the following reaction and label it with key vocabulary, such as active sites…..etc.
Surface Reaction – Hydrogenation, Ni, Pd - Ethene + H_2.mp4

Draw out energy profiles for catalysed endothermic and exothermic reactions.

The following animation shows one example of a reaction, which is catalysed, give some other examples:

• include the catalyst used
  
• the equation for the reaction
  
• whether the mechanism is heterogeneous or homogeneous
  

Surface Reaction – Hydrogenation H2 + C2H4.mp4 ·⁷
Hydrogenation Mechanism.mp4 ·²¹

Look at the following links and then write a short passage about enzymes, as a minimum include:

• what are they?
  
• how do they work?
  
• selectivity
  
• inhibitors
  
• some examples
  

Enzyme Functions.mp4
Competitive and Non-Competitive Inhibition of Enzymes.mp4 ·³³

Search for information on catalytic converters and answer the following questions.

• What are the oxidation reactions in the catalytic converter?
  
• What are the reduction reactions in the catalytic converter?
  
• Research online to find out:
  
• 2 chemistry definitions of oxidation and reduction.
  
• what catalysts are used and how many grams of each catalyst are present?
  
• in which kind of vehicles are catalytic converters fitted and the most effective?
  
• in diesel engines, what problems need to be overcome to make catalytic converters effective?
  
• what is the chemical formula of soot?
  

Watch this video

• What is the catalyst in the following reaction?
  
• Where does the catalyst come from? Comment on this.
  

Catalytic Destruction of Stratospheric Ozone.mp4 ·⁷
This is the mechanism in more detail - can you understand it? What do the arrows represent? HINT: Where are they coming from? ·^J.Wilson

Visit the following website:

• Click contents on the left side
  
• Go down and study the "Principles of Catalysis" links
  
• Continue when done by looking at ONE of the case studies above in applied catalysts
  
• Write a summary of what you learn.
  

Catalysis - Large Website - CIEC