English National Curriculum - Science

Investigating the effect of catalysts

Mission Objectives

Define the term activation energy

Identify the advantages of using catalysts in industrial reactions

Explain the effect of using a catalyst on activation energy

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Keywords

Words and meanings to learn

activation energy

the minimum amount of energy that particles need to successfully react when they collide

reaction profile

a diagram that shows how the energy of the reactants and products changes during a chemical reaction; it also shows the activation energy

enzyme

a biological catalyst made of protein; enzymes speed up reactions in living things without being used up

catalyst

a substance that speeds up a chemical reaction without being used up or changed by the reaction; it allows the reaction to happen faster

alternate pathway

a different route that a reaction can take when a catalyst is used; this pathway has a lower activation energy, so the reaction happens more easily

This lesson has been written by

Samantha Batch

Samantha is a dedicated and accomplished science educator with over 15 years of leadership experience in the field, coupled with a strong background in scientific analysis. She has a proven track record of strategically managing educational departments, driving operational efficiencies, and nurturing collaborative relationships with stakeholders. 

Samantha previously served as the Head of Chemistry and Sixth Form Tutor, Ilkley Grammar School, Ilkley with extensive Key Stage 4 and 5 teaching experience and leadership. In addition to her teaching and leadership roles, she is also an examiner for AQA, providing her with valuable insight into assessment standards and exam specifications.

In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket, where she's enthusiastically honing her skills both on and off the pitch!

Required Resources

Elephant’s toothpaste demo:

  • Hydrogen peroxide
  • Washing up liquid
  • Large measuring cylinder
  • Potassium iodide
  • Spare trays

Genie in a bottle demo:

  • 25 cm3 hydrogen peroxide, 100 vol (30%), (harmful, risk of serious damage to eyes)
  • c.0.5 g manganese(IV) oxide (harmful by inhalation and ingestion)
  • 250 cm3 borosilicate conical flask with a narrow neck (30–40 mm), or poly(ethylene terephthalate) (PET) carbonated drinks bottle
  • Bung with a hole bored through it
  • Filter funnel
  • Tissue paper
  • Cotton thread

Class practical:

  • Hydrogen peroxide
  • Iron oxide
  • Copper oxide
  • Manganese oxide
  • Diced potato
  • Diced apple
  • Diced liver
  • Conical flasks
  • Gas syringe, tubing & rubber bung

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