Influence of admixtures and of mixing on precipitat ion of Mg(OH) 2 from nitrate solution

Precipitation of Mg(OH) 2 from magnesium nitrate solution was studied by means of recording pH of the reacting mixture. Solution of NH 4OH was used as the alkalizing agent. The sequence of addition of reactants, rate and time of stirring, and the excess of NH 4OH with respect to stoichiometry influence change in pH, an d 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.