Steps in Precipitation Reactions

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Abstract
The combined application of various methods of investigation (e.g. nephelometry, conductivity measurements, electron microscopy, isotope exchange, BET surface area determinations, paper chromatograhy, coprecipitation) lead to a refined insight into the course of precipitation reactions. The formation of a new solid phase within a solution can, in the case of ionic crystals, be formally described as proceeding via a number of steps – nucleation, growth, ripening, and recrystallization (aging) – which overlap in time. The precipitation of hydroxides is a more complex process since additional chemical reactions (e.g. hydrolysis, condensation reactions) take place within the newly formed solid phase.

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