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Question
A colloidal sol is prepared by the given method in the figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube? How is the solution represented?
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Solution
If FeCl3 is added to NaOH, a negatively charged sol is obtained with adsorption of OH- ions. Sol is represented as Fe2O3.xH2O/OH- (negatively charged).
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