Rate Law Sn1

Question

SN1 rate law for tert-butyl bromide in aqueous ethanol depends on:

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1. **SN1 Definition**: **S**ubstitution **N**ucleophilic **Unimolecular**.
2. **Steps**: 
   - Step 1 (Slow): $R-Br 	o R^+ + Br^-$ (Ionization).
   - Step 2 (Fast): $R^+ + Nu^- 	o R-Nu$.
3. **Rate Determining Step (RDS)**: The overall reaction rate is limited by the slowest step (Step 1).
4. **Unimolecularity**: Only the alkyl halide (**substrate**) is involved in Step 1. The nucleophile is not involved until the fast second step.
5. **Kinetics**: **Rate = $k [Substrate]$**. The rate is independent of the nucleophile's concentration or strength.

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Rate Law Sn1

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