Abstract White ferrous hydroxide floc was simply prepared by the reaction of ferrous sulfate solution and sodium hydroxide solution,which were ready in advance with NaCl solution.The prepared flocculent precipitate could exist stably in a long time because the dissolved oxygen in solution was reduced greatly by the salting-out effect.The instability of ferrous hydroxide could be understood by investigating the objective phenomena in a series of changes of floc through the segmentation display method.
CHEN Yang-Zhan, WU Shuang, CAI Shuang-Lian. Slow Down Oxidation in Preparation of Ferrous Hydroxide[J]. Chinese Journal of Chemical Education, 2017, 38(11): 61-63.
