Influence of admixtures and of mixing on precipitation of Mg(OH)2 from nitrate solution
Institute of Inorganic Chemistry, Technology and Materials, Faculty of Chemical and Food Technology, SUT, Radlinského 9, 812 37 Bratislava, Slovakia
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Abstract: Precipitation of Mg(OH)2 from magnesium nitrate solution was studied by means of recording pH of the reacting mixture. Solution of NH4OH was used as the alkalizing agent. The sequence of addition of reactants, rate and time of stirring, and the excess of NH4OH with respect to stoichiometry influence change in pH, and consequently the rate of crystallization and sedimentation of the reaction product, viz. Mg(OH)2. The presence of calcium nitrate up to 10 mass % does not influence remarkably the precipitation process.
Keywords: magnesium hydroxide, ammonium nitrate, calcium nitrate, rate of precipitation
Full paper in Portable Document Format: acs_0043.pdf
Acta Chimica Slovaca, Vol. 2, No. 2, 2009, pp. 14—20