Pseudo-First-Order Rate Constant (k_obs = k [B]₀ (excess B))
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k_obs = k [B]₀ (excess B)
What each symbol means
| Symbol | What it stands for |
|---|---|
| k | Second-order constant (L mol⁻¹ s⁻¹) |
| k_obs | Observed first-order constant (s⁻¹) |
| [B]₀ | Initial concentration of excess reactant (≈ constant) |
When to use this
When [B] is in large excess, [B]≈[B]₀ and v = k_obs[A] with k_obs=k[B]₀.