摘要
大学本科《无机制备》实验课程中硫代硫酸钠的制备方法,反应时间长,灯用酒精耗量大,产率较低,且有时得到的是白色粉状物,加晶种也无晶体析出.为此,利用微波加热均匀、快速、高效节能等特点来制备硫代硫酸钠.研究了微波功率、反应时间、结晶的方法、硫粉是否用乙醇润湿等实验条件对硫代硫酸钠产率的影响,为大学本科学生《无机制备》实验课程开设该实验提供了一套较为成熟的实验方案.
The original method of synthesizing sodium thiosulfate described in ＂Inorganic Synthesis＂ course has the drawbacks of long reaction time,lots of burner alcohol and low yield.Sometimes,white powders are obtained and no crystal separates out even with the addition of crystal seeds.Herein,we have developed a method for sodium thiosulfate preparation with the help of microwave heating for its features of fast heating,high efficiency and energy conservation.The effects of experimental conditions such as microwave power,reaction time,methods of crystallization and wetting of sulfur powder with ethanol on yield of sodium thiosulfate have been investigated.Therefore,a relatively simple experimental scheme for the ＂inorganic synthesis＂ course is recommended for the synthesis of sodium thiosulfate.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期114-117,共4页
Journal of Southwest China Normal University(Natural Science Edition)
基金
西南大学本科实验教学改革行动计划资助项目(西校[2010]225)
关键词
硫代硫酸钠
微波
合成
无机制备
sodium thiosulfate
microwave
synthesis
inorganic synthesis
