What is the rate determining step of a reaction?

Explanation

### Step-by-Step Solution

1. **Understanding the Concept of Rate Determining Step (RDS)**:
- The rate determining step is the slowest step in a multi-step reaction mechanism. It controls the overall rate of the reaction because the entire process cannot proceed faster than this slowest step.

2. **Example Reaction**:
- Consider the reaction where ozone (O3) converts to oxygen (O2). The balanced equation for this reaction is:
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