(北京专版)2019中考化学复习方案专项突破01溶解度曲线和溶解度表课件.pptx

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专项(一) 溶解度曲线和溶解度表,3.应用,图G1-1,不饱和,饱和,饱和,增大,较大,降低,丙乙甲,不饱和,饱和,62.5,14,20%,增加溶质(或蒸发溶剂或降温),变小,变小,乙丙甲,乙甲丙,丙甲=乙,丙乙甲,乙丙甲,甲,丙,甲,(6)判断物质结晶或提纯的方法(如图所示),当甲中含有少量乙时,可用 法分离出甲。 当乙中含有少量甲时,可用 法分离出乙。,降温结晶,蒸发结晶,二、溶解度表 1.从表中直接读取信息 (1)同一物质,不同温度下的溶解度; (2)不同物质,在相同温度下的溶解度; (3)根据不同温度下溶解度的变化情况,判断物质的溶解度随温度的变化趋势。 2.溶解度表的应用 以表格数据形式考查两种物质两种溶解度相等时的温度范围。,图G1-2,答案C,2.2018青岛 已知氯化钾、硝酸钾在不同温度时的溶解度如下表:,图G1-3,答案D,答案A,图G1-4,水,等于,图G1-5,BCF,

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