2022年人教版化学九年《溶质的质量分数》word学案 .pdf
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2022年人教版化学九年《溶质的质量分数》word学案 .pdf
名师精编优秀教案花 官 初 中 学 案年级八科目化学课题溶质的质量分数课型新授执笔人孙金元审核人单位审核学习时间第周 星期教师寄语多数人想要改造这个世界，但却罕有人想改造自己。学习目标1.使学生初步理解溶液中溶质的质量分数定义。2使学生掌握溶质的质量分数的有关计算。3.溶液的配制学习内容基本要求1.体现学习的主要内容；2.典型例题；3.精选练习；4.课堂达标检测。学 习 的 主 要 内 容学 习 笔 记【自学与讨论】在不饱和溶液中增加溶质的质量将引起哪些量的变化？怎样变？在不饱和溶液中增加溶剂的质量将引起哪些量的变化？怎样变？如何使原有溶液中溶质的质量分数增大或减小？【课堂练习】1从 1000 克 1%的氯化钠溶液中取出100 克，则这 100 克溶液中溶质的质量分数是（）A.1%B.0.1%C.10%D.无法判断2填写下表：溶质的质量溶剂的质量溶液的质量溶质的质量分数增大不变不变减少不变减少不变增大320 克溶质完全溶解在80 克溶剂中，该溶液中溶质的质量分数为（）A.25%B.25克 C.20%D.20克4配制 150 克 20%的氯化钠溶液，需要氯化钠和水各多少克？名师精编优秀教案5在 20时，硝酸钾的溶解度是31.6 克，20时硝酸钾饱和溶液中的硝酸钾的质量分数是多少？65在一定温度下，某饱和溶液中溶质的质量分数为A%，此溶质在该温度下的溶解度是多少？710时，硝酸钾饱和溶液中硝酸钾的质量分数是17.3%，该温度下硝酸钾的溶解度是多少？8把 100 克 98%的硫酸稀释成10%的稀硫酸需加水多少克？9把 50 克质量分数为20%的氯化钠溶液加水稀释到200 克，此溶液中氯化钠的质量分数为多少？文档编码:CP4G2I1W9E4 HZ8T1L9G5C3 ZX7I9S8C10H2文档编码:CP4G2I1W9E4 HZ8T1L9G5C3 ZX7I9S8C10H2文档编码:CP4G2I1W9E4 HZ8T1L9G5C3 ZX7I9S8C10H2文档编码:CP4G2I1W9E4 HZ8T1L9G5C3 ZX7I9S8C10H2文档编码:CP4G2I1W9E4 HZ8T1L9G5C3 ZX7I9S8C10H2文档编码:CP4G2I1W9E4 HZ8T1L9G5C3 ZX7I9S8C10H2文档编码:CP4G2I1W9E4 HZ8T1L9G5C3 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