Abstract By heating aqueous solutions of ammonium chloride and sodium bicarbonate of different concentrations, qualitative and quantitative analysis and theoretical calculations were used to explore their decomposition in aqueous solutions. In quantitative analysis, chemical precipitation method was used to calculate the decomposition rate of substances in real experiment situations, improving accuracy. The study showed that both ammonium chloride and sodium bicarbonate in the solution decomposed when heated with the inner flame of an alcohol lamp. The decomposition rate showed an increasing trend as the solution concentration increased. At the same temperature and concentration, and heated for the same time, the decomposition rate of ammonium chloride in the solution was lower than that of sodium bicarbonate. The research results had certain implications for the heating research of other ammonium salts and weak acid salts in aqueous solutions.
MA Kai-Xuan. Quantitative Study on Thermal Decomposition of Ammonium Chloride and Sodium Bicarbonate in Aqueous Solution[J]. Chinese Journal of Chemical Education, 2025, 46(7): 95-101.
