["化學の小知識-硝酸钠", ["本帖最后由 yangyanrong 于于 22018-113 18: 编辑化学式KNO3，天然产物俗名塩基硝石、火硝、土硝等，产于于農村土房壁脚、地面，岩石表面或石灰岩、盐沼地、沙漠区域。無色、透明、六角方形柱状晶体或白色晶状粉末。質脆、有ガラス光澤、有刺激涼咸味、在44℃分解成亜硝酸钾KNO2和氧气。溶于于水、稀エタノール和甘油、溶解时吸热、不溶于无水エタノール、在空气中不潮解。水溶液中無溶解度受温度影响较大、 1g水时61 13g、 22℃时溶32g、 111℃时溶246g。常用来制造黒火药、导火索、玻璃、火柴、烟火、也用作肥料 (兼作塩基肥料、氮肥料) 和实验室分析试剂等。可由硝酸钠溶液与氯化钾作用来K取。"]

2018-11-13View Original

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本帖最后由 yangyanrong 于 2018-11-13 18:00 编辑化学式KNO3，天然产物俗名钾硝石、火硝、土硝等，产于农村土房墙脚、地面，岩石表面或石灰岩、盐沼地、沙漠区域。无色、透明、六角方形柱状晶体，或白色晶状粉末。质脆，有玻璃光泽，有刺激性凉咸味，在400℃分解成亚硝酸钾KNO2和氧气。溶于水、稀乙醇和甘油，溶解时吸热，不溶于无水乙醇，在空气中不潮解。水溶液中性，溶解度受温度影响较大，0℃时100g水可溶13g，20℃时溶32g，100℃时溶246g。常用来制造黑**、导火索、玻璃、火柴、烟火，也用作肥料 (兼作钾肥、氮肥) 和实验室分析试剂等。可由硝酸钠溶液与氯化钾作用来制取。

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