Solutions of Cu (NO3)2, FeCl3, and CaCO3 of the same concentration are added to identical samples of silica sols with a positive charge of counterions. Which of the ions of these electrolytes will cause coagulation of the sol? What electrolyte is needed less?

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter32: Gas Chromatography
Section: Chapter Questions
Problem 32.17QAP
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Solutions of Cu (NO3)2, FeCl3, and CaCO3 of the same concentration are added to identical samples of silica sols with a positive charge of counterions. Which of the ions of these electrolytes will cause coagulation of the sol? What electrolyte is needed less?

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