Question

What is meant by the activity of a solute?

   What is meant by the activity of a solute?

Physical Chemistry for the Life Sciences

Physical Chemistry for the Life Sciences

Peter Atkins, Julio… 1st Edition

Chapter 3, Problem 4

Instant Answer

Solved by Expert Ajay Singhal

06/14/2021

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Activity refers to a measure of the effective concentration of a solute in a solution, which takes into account interactions between solute particles and the solvent. Show more…

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What is meant by the activity of a solute?

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Key Concepts

Activity

Activity is the effective concentration of a solute in a solution, which accounts for non-ideal interactions among solute particles and between solute and solvent. It is a thermodynamic quantity that more accurately represents the solute's chemical potential and reactivity compared to its simple molar concentration, especially in systems where interactions cause deviations from ideal behavior.

Activity Coefficient

The activity coefficient is a factor that adjusts the measured concentration of a solute to its effective concentration, or activity, in a non-ideal solution. In ideal solutions, this coefficient is equal to one, but in real solutions it can differ due to intermolecular forces, providing a necessary correction that reflects the true behavior of the solute in thermodynamic processes.

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