13问答网 > 从氯化钠和硝酸钾溶液中提取硝酸钾时，先经过蒸发结晶趁热过滤后得到的溶液，再降温结晶析出硝酸钾晶体。

从氯化钠和硝酸钾溶液中提取硝酸钾时，先经过蒸发结晶趁热过滤后得到的溶液，再降温结晶析出硝酸钾晶体。

2025-03-15 12:12:09
推荐回答（1个）
回答1：

冷却热饱和溶液（降温结晶）一般是谁多用谁的结晶方法, 硝酸钾的溶解度随温度的升高而增大,且变化大,用冷却热饱和溶液的方法结晶氯化钠的溶解度随温度的升高而增大,但变化不大,用蒸发溶剂的方法结晶含有少量氯化钠的硝酸钾溶液中提纯硝酸钾,硝酸钾比氯化钠多,所以用冷却热饱和溶液的方法结晶

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