A colloidal system is stable in the absence of polymer. a, Ask an Expert

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A colloidal system is stable in the absence of polymer. A small amount of polymer is added and the colloidal particles coagulate but if a large amount of polymer is added they redisperse. In another system no coagulation occurs when a small amount of polymer is added but does occur at high polymer concentrations. Discuss the likely nature of the polymer, particle surfaces and solvent in each case.

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