Abstract In a discussion of whether salt double hydrolysis could be carried out in the end, students calculated that the equilibrium constant of AlCl3 and CH3COONa was very large, but subsequent experiments found that there was no significant phenomenon after mixing the two salt solutions. Access to data and design experimental studies showed that mixing AlCl3 and CH3COONa solution at room temperature might obtain a weak electrolyte Al(CH3COO)3. When the temperature increased, Al(CH3COO)3 might undergo first-order ionization to obtain Al(CH3COO)2+, which reacted with OH- in solution to form white precipitates such as Al(OH)(CH3COO)2. Using this experiment as a real-life scenario to implement teaching activities, this paper guided students to understand the scientific method of “finding problems, proposing hypothesis, experimental verification and drawing conclusions”, explored the teaching function of the experiments, and developed students' core qualities of disciplines such as evidence reasoning, experimental inquiry and innovative consciousness.
LU Yan-Hai, WU Wen-Zhong. Ion Behavior of Aluminum Chloride Mixed with Sodium Acetate Solution[J]. Chinese Journal of Chemical Education, 2025, 46(3): 76-80.
