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第 6 章 酸碱滴定法 6

第 6 章 酸碱滴定法 6

第 6 章 酸碱滴定法 6. 多元酸碱滴定、酸碱滴定法的应用. 弱酸准确滴定的条件:. 弱酸准确滴定条件: cK a ≥10 -8 对于 0.1000mol·L -1 的 HA, K a ≥10 -7 才能准确滴定. 6.9 多元酸 ( 碱 ) 的滴定:. 多元酸能分步滴定的条件 滴定计量点的 pH 值的计算 指示剂的选择. 被滴定的酸足够强 , cK an ≥10 -8 相邻两步解离相互不影响,△ lg K a 足够大 , 若△ pH=±0.2, 允许 E t =±0.3% , 则需 △ lg K a ≥5. 多元酸能分步滴定的条件 :.

By rufus
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