以培养研究型人才为导向的基础化学实验教学设计与实践
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王静, 李会平, 王小燕, 罗世忠, 王书文
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Design and Practice of Basic Chemistry Experiment Teaching Guided by Training Research Talents
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Jing Wang, Huiping Li, Xiaoyan Wang, Shizhong Luo, Shuwen Wang
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表4 不同pH条件下反应时间对Na2S2O3溶液标定的影响
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| 0.2 mol·L-1 H2SO4溶液体积V(H2SO4)/mL | pH | 基准物反应时间t/min | V(Na2S2O3)/mL | c(Na2S2O3)/(mol·L-1) | | 7 | 5.23 | 0 | 26.44 | 0.1061 | | 1 | 26.40 | 0.1063 | | 3 | 26.38 | 0.1064 | | 7.5 | 4.22 | 0 | 28.19 | 0.09954 | | 1 | 28.04 | 0.1001 | | 3 | 28.00 | 0.1002 | | 5 | 28.00 | 0.1002 | | 8 | 2.96 | 0 | 28.22 | 0.09943 | | 1 | 28.21 | 0.09947 | | 3 | 28.01 | 0.1002 | | 5 | 28.00 | 0.1002 | | 11 | 1.95 | 0 | 28.20 | 0.09951 | | 1 | 28.09 | 0.09990 | | 3 | 28.02 | 0.1001 | | 5 | 27.94 | 0.1004 |
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