THE TIME OF SETTING AND CHANGES IN H-ION CONCENTRATION DURING THE SEITING OF GELS FORMED BY THE INTERACTION OF OPPOSITELY CHARGED SOLS. PART II. THE INTERACTlON OF NICKEL HYDROXIDE AND MANGANESE DIOXIDE SOLS WITH ALUMINIUM HYDROXIDE SOL

The time of setting of the gels obtained by mixing negatively charged sots of (I) nickel hydroxide and (ii) manganese dioxide with positively charged sol of aluminium hydroxide has been measured at 35°. The relation t= Rα^-- is found to hold between the time of setting (I) and the volume lα). of the oppositely charged sols. No appreciable changes in \(p\)H take place during the formation of these gels.