What type of charge does the colloidal particle in soap sol carry?
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The origin of the charge on the sol particles in most cases is due to the preferential adsorption of either positive or negative ions on their surface. The sol particles acquire electrical charge in any one or more of the following ways. ... (ii) The dispersion medium must also get some charge, because of the friction.
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By mutual rubbing of colloidal particles with molecules of the dispersion medium, the charge is developed on the sol.
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