摘要
受2018年北京高考化学试题第11题启发,选取浓度为0.1 mol·L-1的Na2SO3,Na2CO3,NaHCO3溶液为代表物,利用手持技术分别测定这3种盐溶液的pH随温度变化的数据,并依据实验数据分析结果,探讨因温度改变引起盐类水解、水电离、氧化还原反应、物质稳定性变化对溶液的pH的综合影响。
Inspired by question 11 of the 2018 Beijing College Entrance Examination Chemistry Question,this paper chooses 0.1 mol·L-1 Na2SO3,Na2CO3 and NaHCO3 solutions as representatives,using the hand-held technology to measure the data of the pH changes of the three salt solutions with temperature respectively.Based on the analysis results of the experimental data,the comprehensive influence of salt hydrolysis,water ionization,oxidation-reduction reaction and heat stability on solution pH due to temperature changing are discussed.
作者
郭玉林
史文杰
李冉
GUO Yu-Lin;SHI Wen-Jie;LI Ran(Beijing Chaoyang District Teaching and Research Center,Beijing 100028,China;High School Affiliated to University of Foreign Trade and Economics,Beijing 100102,China)
出处
《化学教育（中英文）》
CAS
北大核心
2020年第19期107-110,共4页
Chinese Journal of Chemical Education
关键词
盐类水解
水的电离
平衡移动
pH与温度的关系
手持技术
salt hydrolysis
ionization of water
equilibrium moving
pH-temperature relationship
handheld technology
