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19. Which of the following ions have minimum value offlocculating power?(a) PO4^3- (b) SO4^2- (c) So3^2-(d) NO3- |
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Answer» Answer: NO3- Explanation: Flocculating is defined as the precipitating ability of an ion, i.e how easily it can precipitate a sol. Since all the options given are negatively CHARGED ions, IM assuming the sol in question is a positively charged sol. According to Hardy-Schulz rule , the greater is the valence of the oppositely charged ion of the electrolyte added to a colloidal solution, the faster is the COAGULATION of the colloidal solution. In this case, the ion with the MAXIMUM charge is PO4^3-, and the ONE with the least charge is NO3-. Therefore, the ion with minimum value of flocculating power is NO3- |
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