A typical diffusion constant for small molecules in aqueous solution at 25 °C is 6 × 10−9 m2 s−1. If the critical reaction distance is 0.5 nm, what value is expected for the second-order rate constant for a diffusion-controlled reaction?

A typical diffusion constant for small molecules in aqueous solution at 25 °C is 6 × 10−9 m2 s−1. If the critical reaction distance is 0.5 nm, what value is expected for the second-order rate constant for a diffusion-controlled reaction?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter11: Chemical Kinetics: Rates Of Reactions

Section: Chapter Questions

Problem 113QRT

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Question

A typical diffusion constant for small molecules in aqueous solution at 25 °C is 6 × 10⁻⁹ m² s⁻¹. If the critical reaction distance is 0.5 nm, what value is expected for the second-order rate constant for a diffusion-controlled reaction?

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