Catalysis

• Scheikunde
• Middelbare school
• vwo
• Leerjaar 4

Rate of reaction: Catalysts

Structure:

-Prior knowledge

-Learning objectives

-Demonstration

-Examples

-Energy diagram

-Summary

Name three ways to increase reaction rate.

Learning objectives

1-2: State two or more examples of catalysts

3-4: Describe at least one reaction which is made faster using a catalyst

5-6: Explain how a catalyst works using collision theory

7-8: Suggest how a catalyst may affect the activation energy required for a reaction.

Demonstration

What did you observe?

Co2+ <--> Co3+

Catalysts

1. Speeds up reactions by stabilizing intermediate reaction products

2. Gets used in a reaction but not consumed

X + Y = Z 

X + C → XC

Y + XC → XYC

XYC → CZ

CZ → C + Z

Catalytic converter

Catalysis: Enzymes

-Often highly specific

-Often extremely efficient

-Able to catalyse complex reactions

Note: usage of more than one substrate is possible.

Energy Diagram

How would a catalyst effect how the energy diagram looks?

How does a catalyst work?
(write a short summary, work in pairs)

Write a question for me!
(can be anything)