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解离常数

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化学生物化学药理学中,解离常数(英语:dissociation constant)是一种特定类型的平衡常数,用于衡量一较大物体与另一较小组分分开(解离)的倾向,也可以描述配合物解体成组分分子分裂为其组分离子。解离常数是缔合常数的倒数。对于一些特定的盐,解离常数亦可被称为电离常数

对于一般的反应:

其中复合物分解为x份A亚单位及y份B亚单位,则解离常数被定义为:

其中[A]、[B]与[AxBy]分别指A、B与复合物AxBy的浓度。

另见

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  • Ki数据库
  • pH
  • 斯卡查德作图

参考文献

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解离常数
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