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摩尔及物质的量浓度是高中化学教材的重点和难点。对此类题进行一题多解,有利于学生对所学概念加深理解,培养了学生灵活运用知识、广开思路分析问题和解决问题的能力,同时诱发了学生的学习兴趣和探讨精神。现举例如下: [例题]将10克锌粒投入36.5克未知浓度(密度1.098克/立方厘米)的盐酸中,当反应停止后,溶液中尚有锌粒剩余,过滤后,滤液质量为42.8克,求这种
The molar concentration of substances and substances is the key and difficult point of high school chemistry textbooks. To solve this type of problem with multiple questions is helpful for the students to deepen their understanding of the concepts they have learned, cultivate the students’ abilities to use knowledge flexibly, broaden their ideas for problem analysis and problem solving, and induce students’ interest in learning and exploration. Examples are as follows: [Example] 10 grams of zinc particles are put into 36.5 grams of unknown concentration (density 1.098 g/cm3) of hydrochloric acid. When the reaction is stopped, zinc particles still remain in the solution. After filtration, the filtrate quality is 42.8 grams. Ask for this