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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:

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Related Experiment Video

Updated: Nov 22, 2025

Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper

Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper

Published on: February 27, 2021

Ecofriendly Method to Dissolve Chitosan in Plain Water.

Boxuan Li^1,2, Juan Wang¹, Mahmoud E Moustafa¹

¹Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23219, United States.

ACS Biomaterials Science & Engineering

|January 8, 2021

Summary

Researchers developed an eco-friendly method to dissolve chitosan in plain water, creating a stable, nanosize chitosan pseudosolution. This breakthrough enhances chitosan

Keywords:

chitosan dissolution method ionic liquid plain water-based solution pseudosolution

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Last Updated: Nov 22, 2025

Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper

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Published on: February 27, 2021

A Freeze-Thawing Method to Prepare Chitosan-Polyvinyl alcohol Hydrogels Without Crosslinking Agents and Diflunisal Release Studies

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Published on: October 26, 2016

Area of Science:

Polymer Science
Biomaterials Engineering
Green Chemistry

Background:

Chitosan, an abundant natural polymer, faces solubility challenges in plain water.
Limited water solubility restricts chitosan's use in biomedical applications.

Purpose of the Study:

To develop an eco-friendly method for dissolving chitosan in plain water.
To create a stable, nanosize chitosan dispersion for enhanced applications.

Main Methods:

Dissolving chitosan in an ionic liquid.
Freezing the solution overnight at -20 °C.
Performing solvent exchange with plain water at room temperature.

Main Results:

A stable, water-based chitosan pseudosolution with nanosize particles was successfully obtained.
The developed method is confirmed to be eco-friendly.
Improved quality and processability of chitosan solutions were achieved.

Conclusions:

This novel method overcomes chitosan's water solubility limitations.
The eco-friendly process facilitates broader biomedical and bioprocessing applications of chitosan.
The resulting nanosize chitosan dispersion offers enhanced material properties.