通过拓展大学化学实验培养学生探索创新能力——以“硫酸铜中铜含量测定(碘量法)”为例
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孙瑞卿, 许紫婷, 魏巧华
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Developing Students' Exploration and Innovation Ability through Expanding University Chemistry Laboratory: Taking "Determination of Copper Content in Copper Sulfate (Iodometry)" as an Example
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Ruiqing Sun, Ziting Xu, Qiaohua Wei
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表3 硫酸铜铜含量测定计算表(KSCN在淀粉之后加入)
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| cCuSO4/(mol∙L−1) | 次数 | cNa2S2O3/(mol∙L−1) * | VKI/mL | VNa2S2O3/mL** | VKSCN/mL | VNa2S2O3/mL | ρCu/(g∙L−1) | ρCu/(g∙L−1) * | RAD/% | | 0.025 | 1 | 0.02707 | 4 | 20.00 | 2.5 | 22.80 | 1.569 | 1.568 | 0.10 | | 2 | 0.02707 | 4 | 20.00 | 2.5 | 22.80 | 1.569 | | | | 3 | 0.02707 | 4 | 20.00 | 2.5 | 22.75 | 1.565 | | | | 0.05 | 1 | 0.05276 | 8 | 22.50 | 5 | 23.85 | 3.199 | 3.196 | 0.06 | | 2 | 0.05276 | 8 | 22.50 | 5 | 23.82 | 3.195 | | | | 3 | 0.05276 | 8 | 22.50 | 5 | 23.82 | 3.195 | | | | 0.1 | 1 | 0.1024 | 8 | 19.00 | 10 | 20.20 | 5.258 | 5.267 | 0.11 | | 2 | 0.1024 | 8 | 19.00 | 10 | 20.25 | 5.271 | | | | 3 | 0.1024 | 8 | 19.00 | 10 | 20.25 | 5.271 | | |
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