Abstract This paper studied the changes of conductivity and turbidity during the preparation of ferric hydroxide colloid from NaOH solution and FeCl3 solution by digital experiments. Then this paper clarified that the essential difference among solution, colloid and turbid liquid was the increasing of diameter of dispersoid particles from tetra-representation(macroscopic, microscopic, symbol and curve), which would help students understand the essence of dispersion system from the micro level.
SUN Ying, XIN Xin, FENG Zheng-Wu. Inquiry on the Formation of Ferric Hydroxide Colloid Particles by Digital Experiments[J]. Chinese Journal of Chemical Education, 2018, 39(3): 65-68.
