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# 滴定液的标定 - PowerPoint PPT Presentation

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## PowerPoint Slideshow about '滴定液的标定' - herne

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### 滴定液的标定

• 1、基准物质标定法
• 例：用邻苯二甲酸氢钾（KHC8H4O4）标定NaOH溶液时，准确称取0.5105g基准邻苯二甲酸氢钾，以酚酞作指示剂，终点时消耗NaOH滴定液25.00ml，求NaOH滴定液的浓度？

• 滴定反应式为：
• 故a=1，b=1，已知KHC8H4O4的摩尔质量为204.2g/mol，根据滴定分析计算公式可得：

• 2、滴定液比较法
• 例：准确量取20.00ml HCl溶液，滴加酚酞指示剂，用0.1000mol/L的NaOH滴定液滴定，终点时消耗NaOH溶液22.00ml，求HCl溶液的浓度。

• 滴定反应式为：
• NaOH + HCl = NaCl + H2O
• 故a=1，b=1，由滴定反应计算公式可得：
• 答：HCl溶液的浓度为0.1100mol/L。