| 单词 | ionic strength |
| 释义 | > as lemmasionic strength ionic strength n. (a) the degree of ionic character of a substance or entity (now disused); (b) a numerical quantity representing the strength of the electric field in a solution.The numerical value of the ionic strength is calculated by determining, for each type of ion present, the product of the molality and the square of its charge, adding these products, and dividing the result by two. ΚΠ 1903 Chem. Engin. 1 563/2 The speaker showed that with respect to its ionic ‘strength’ the rhodanic ion lies between iodine and bromine. 1921 G. N. Lewis & M. Randall in Jrnl. Amer. Chem. Soc. 43 1141 Before stating this new principle, we shall introduce a new term, the ionic strength. In any solution of strong electrolytes let us multiply the stoichiometrical molality of each ion by the square of its valence (or charge). The sum of these quantities, divided by two (since we have included both positive and negative ions), we shall call the ionic strength, and designate by μ. 1954 T. Vickerstaff Physical Chem. Dyeing (ed. 2) iv. 105 The Debye–Hückel theory in this simple form is applicable only to dilute solutions in which the total ionic strength is low. 2001 Ann. Bot. 88 1093/1 Water removal can lead to membrane damage, increased ionic strength and a change in pH, causing crystallization of solutes. < as lemmas |
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