| 单词 | phosphoric acid |
| 释义 | > as lemmasphosphoric acid phosphoric acid n. Chemistry an oxyacid containing pentavalent phosphorus; spec. orthophosphoric acid, H3PO4; (also more generally) phosphorus pentoxide (cf. phosphoric anhydride n.). ΘΚΠ the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing phosphorous phosphoric acid?1765 hypophosphorous acid1818 phosphatic acid1818 hypophosphoric acid1854 ?1765Phosphoric acid [see sense 1]. 1861 Amer. Agriculturist Jan. 1/2 Separating the silex, the lime,..the phosphoric acid, and other known and unknown elements of various soils. 1912 J. W. Mellor Mod. Inorg. Chem. xxx. 597 The three phosphoric acids and their salts are distinguished by the difference in their behaviour towards silver nitrate. 1941 Thorpe's Dict. Appl. Chem. (ed. 4) V. 69/2 These phosphates have a range of from about 25–32% of phosphoric acid (P2O5). 1989 J. Button How to be Green 32 The descaler you use to clean the bath may well contain phosphoric acid, which could cause serious eye and skin injuries. < as lemmas |
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