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What is meant by a diffusion-controlled reaction? What is a typical rate constant for a diffu-sion-controlled reaction in aqueous solution?

What will be an ideal response?

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For bimolecular chemical reactions in solution, the presence of solvent molecules can result in reaction dynamics that differ significantly from those in the gas phase. In solution the presence of the solvent molecules results in a number of solvent–solute collisions before the reactants collide. Subsequently, the uninterrupted approach of the reactants characteristic of a gas-phase reaction is replaced by the reactants undergoing diffusion in solution until they en-counter each other. In this case, the rate of diffusion can determine the rate of reaction.

  • #2
I can't thank you enough.