中考复习—为什么将氢氧化钠固体、生石灰密封保存？
侯英超 |
发布日期：2010-06-09 06:03:27
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：氢氧化钠固体会吸收空气中的水和二氧化碳，发生如下反应CO2+2NaOH=Na2CO3+H2O，会潮解、变质。同样生石灰会有如下反应 CaO+H2O=Ca(OH)2，CO2+Ca(OH)2=CaCO3↓+H2O而变质，所以二者都需要密封保存。 |
