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
The apparatus needed to investigate the effect of a catalyst on the rate of reaction
Solid catalysts: Use different solid catalysts such as Manganese (iv) Oxide, Platinum, Iron and Vanadium (v) Oxide etc…
- 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
- 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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