摘要
通过一系列实验发现,新制的氨水与硝酸银溶液反应只能看到暗棕色的氧化银沉淀生成与溶解的实验现象;氨水与空气接触时间较长时,部分氨水吸收了空气中的二氧化碳生成碳酸铵,这样的氨水与硝酸银溶液反应,便有白色的碳酸银沉淀生成。
Through a series of experiments, this paper obtained that: the formation and dissolution of dark brown silver oxide precipitate could only be seen in the reaction of newly prepared ammonia water and silver nitrate solution;when ammonia water was exposed to air for a long time, part of the ammonia water absorbed carbon dioxide from the air to produce ammonium carbonate, then the ammonia water reacted with silver nitrate solution, white silver carbonate precipitates generated.
作者
程瑶琴
熊言林
信欣
CHENG Yao-Qin;XIONG Yan-Lin;XIN Xin(College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241000,China)
出处
《化学教育（中英文）》
CAS
北大核心
2019年第23期75-76,共2页
Chinese Journal of Chemical Education
关键词
银氨溶液
沉淀颜色
沉淀成分
Tollens’ Reagent
color of precipitation
composition of precipitation
