Specification Point 3.16:
Practical: Investigate the effect of different solids on the catalytic decomposition of Hydrogen Peroxide solution

Catalytic decomposition: When a decomposition reaction occurs with the aid of a catalyst

Effect of Different Solids on the Catalytic Decomposition of Hydrogen Peroxide Solution

Effect of catalyst, Edexcel IGCSE Chemistry

The apparatus needed to investigate the effect of a catalyst on the rate of reaction

Factors:

Solid catalysts: Use different solid catalysts such as Manganese (iv) Oxide, Platinum, Iron and Vanadium (v) Oxide etc…

Method:

  • Add Hydrogen Peroxide into a conical flask
  • Use a capillary tube to connect this flask to a measuring cylinder upside down in a bucket of water (downwards displacement)
  • Add the solid catalyst into the conical flask and close the bung
  • Measure the volume of gas produced in a fixed time using the measuring cylinder
  • Repeat experiment with different solid catalysts

Result:

  • Using a catalyst will increase the rate of reaction
  • The catalyst will provide an alternative pathway requiring lower activation energy so more colliding particles will have the necessary activation energy to react
  • This will allow more frequent and successful collisions, increasing the rate of reaction
  • Rate of reaction can be determined by volume of gas produced over time
  • A better solid catalyst will increase the rate of reaction more than a poor solid catalyst

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Author: Jamie

Jamie got a First class degree in Chemistry from Oxford University before going on to teach chemistry full time as a professional tutor. He’s put together these handy revision notes to match the Edexcel IGCSE Chemistry specification so you can learn exactly what you need to know for your exams.