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Does Hf Fully Dissociate
问氢氟酸是否完全电离
夫酸之电离,于学界素有探讨。氢氟酸($HF$)者,弱酸也,其在水中非完全电离。
盖因氢原子与氟原子间之化学键甚强,虽水之作用可致其有部分电离,然难达完全之境。当氢氟酸溶于水,部分$HF$分子离解为氢离子($H^+$)与氟离子($F^-$),然同时亦有大量$HF$分子保持完整。
观之实验数据,于一定温度与浓度下,测定氢氟酸溶液之酸碱度,可知其氢离子浓度较理论上完全电离时为低。再者,以电导率等方法测之,亦能证氢氟酸仅部分电离。
综上,可知氢氟酸并不完全电离。
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Fanki Shi
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