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Oscillating Clock

Last updated

Feb 28, 2023
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- Methanol Rockets
- Smoke on Touch

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The Briggs-Rauscher reaction is an oscillating reaction like the Belousov-Zhabotinsk reaction.

Introduction

Reactions

The essential features of the system depend on two key processes, each involving many reactions working together:

A ("non-radical process"): The slow consumption of free iodine by the malonic acid substrate in the presence of iodate. This process involves the intermediate production of iodide ion.
B ("radical process"): A fast process involving manganese and free radical intermediates, which converts hydrogen peroxide and iodate to free iodine and oxygen. This process also can consume iodide up to a limiting rate.

IO₃^- + 2 H₂O₂ + CH₂(CO₂H)₂ + H⁺ -> ICH(CO₂H)₂ + 2 O₂ + 3 H₂O

The striking visual demonstration occurs by the addition of a starch indicator.

Safety

Do not drink this.

Introduction

Reactions

Safety

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