Abstract: The topic on spontaneous chiral symmetry breaking in unstirred crystallization was studied from aqueous solution of NaClO3. A sodium chlorate solution was prepared by dissolving the A.R. of the NaClO3 powder in distilled water. A solubility of NaClO3 solution was measured by both Mach-Zehnder interferometry and a weight technique. Total of 11545 chiral crystals were identified by the polarizers. The crystals were grown on spontaneous nucleation from the 90 runs of experiments with different pH value in solution. An experimental results indicated that the pH value in solution could influence the distribution of the crystal chirality of NaClO3. The effect of pH might be explained by stochastic kinetics and embryos coagulation secondary nucleation (ECSN) qualitatively.

Key words: The topic on spontaneous chiral symmetry breaking in unstirred crystallization was studied from aqueous solution of NaClO3. A sodium chlorate solution was prepared by dissolving the A.R. of the NaClO3 powder in distilled water. A solubility of NaClO3 solution was measured by both Mach-Zehnder interferometry and a weight technique. Total of 11545 chiral crystals were identified by the polarizers. The crystals were grown on spontaneous nucleation from the 90 runs of experiments with different pH value in solution. An experimental results indicated that the pH value in solution could influence the distribution of the crystal chirality of NaClO3. The effect of pH might be explained by stochastic kinetics and embryos coagulation secondary nucleation (ECSN) qualitatively.