英语词汇“caustic potash”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

b. Chemistry. caustic alkali: a name given to the hydrates of potassium and sodium, called caustic potash (KHO) and caustic soda (NaHO) respectively; caustic volatile alkali or caustic ammonia, ammonia as a gas or in solution; caustic lime, quick lime (CaO).

ΚΠ

1774 O. Goldsmith Hist. Earth VIII. 143 These flies, thus dried..yield a great deal of volatile caustic-salt.

1791 W. Hamilton tr. C.-L. Berthollet Elements Art of Dyeing I. i. i. v. 80 Caustic alkali tinges the infusion of galls of a dark red.

1811 A. T. Thomson London Dispensatory iii. 485 Take..water of caustic kali, nine fluid ounces.

1813 H. Davy Elements Agric. Chem. i. 19 Lime applied in its caustic state acquires its hardness and durability, by absorbing the aerial acid.

1845 R. B. Todd & W. Bowman Physiol. Anat. I. 102 Add solution of caustic ammonia.

1866 H. E. Roscoe Lessons Elem. Chem. xix. 164 The prepared, caustic potash is a white substance, soluble in half its weight of water, acting as a powerful cautery, destroying the skin.

1876 J. Harley Royle's Man. Materia Med. (ed. 6) 147 Caustic Soda.

b. More fully caustic potash. Potassium hydroxide, KOH, a white, caustic, deliquescent solid which gives a strongly alkaline solution in water (originally regarded as a simple, indecomposable substance rather than a compound). Also: potassium oxide, K₂O, a yellowish white solid (now rare except as in sense 3c; cf. also senses 1b and 3a).

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > potassium > [noun] > compounds > potash

potash1789

potass1799

potassa1801

1789 R. Kerr tr. A. Lavoisier Elements Chem. i. viii. 93 By potash is here meant, pure or caustic alkali, deprived of carbonic acid by quick-lime.

1812 H. Davy Elements Chem. Philos. 324 This substance is pure potash or potassa, which was unknown in its uncombined state till I discovered potassium, but which has long been familiar to chemists combined with water in the substance which has been called pure potash; but which ought to be called the hydrat of potassa.

1846 G. E. Day tr. J. F. Simon Animal Chem. II. 128 If..caustic potash be added to the mass, a considerable quantity of ammonia is given off... When the acid is accurately neutralized with potash, it forms an easily-soluble salt.

1869 H. E. Roscoe Lessons Elem. Chem. (new ed.) xix. 185 Thrown into water, one atom of potassium displaces one of hydrogen from the water, forming potassium hydroxide, or potash, KHO.

1922 T. M. Lowry Inorg. Chem. ix. 103 (caption) The gas..bubbles through a short column of strong potash.

1955 B. C. L. Kemp Elem. Org. Chem. (new ed.) vi. 89 If caustic potash is used for saponification, the product is soft soap.

1985 R. A. E. North Cleaning Professional Kitchens (BNC) 26 Since most soils requiring removal are alkali soluble the active base of a machine detergent tends to be sodium hydroxide (caustic soda) or potassium hydroxide (caustic potash).

单词	caustic potash
释义	> as lemmas caustic potash b. Chemistry. caustic alkali: a name given to the hydrates of potassium and sodium, called caustic potash (KHO) and caustic soda (NaHO) respectively; caustic volatile alkali or caustic ammonia, ammonia as a gas or in solution; caustic lime, quick lime (CaO). ΚΠ 1774 O. Goldsmith Hist. Earth VIII. 143 These flies, thus dried..yield a great deal of volatile caustic-salt. 1791 W. Hamilton tr. C.-L. Berthollet Elements Art of Dyeing I. i. i. v. 80 Caustic alkali tinges the infusion of galls of a dark red. 1811 A. T. Thomson London Dispensatory iii. 485 Take..water of caustic kali, nine fluid ounces. 1813 H. Davy Elements Agric. Chem. i. 19 Lime applied in its caustic state acquires its hardness and durability, by absorbing the aerial acid. 1845 R. B. Todd & W. Bowman Physiol. Anat. I. 102 Add solution of caustic ammonia. 1866 H. E. Roscoe Lessons Elem. Chem. xix. 164 The prepared, caustic potash is a white substance, soluble in half its weight of water, acting as a powerful cautery, destroying the skin. 1876 J. Harley Royle's Man. Materia Med. (ed. 6) 147 Caustic Soda. extracted from causticadj.n. caustic potash b. More fully caustic potash. Potassium hydroxide, KOH, a white, caustic, deliquescent solid which gives a strongly alkaline solution in water (originally regarded as a simple, indecomposable substance rather than a compound). Also: potassium oxide, K₂O, a yellowish white solid (now rare except as in sense 3c; cf. also senses 1b and 3a). ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > potassium > [noun] > compounds > potash potash1789 potass1799 potassa1801 1789 R. Kerr tr. A. Lavoisier Elements Chem. i. viii. 93 By potash is here meant, pure or caustic alkali, deprived of carbonic acid by quick-lime. 1812 H. Davy Elements Chem. Philos. 324 This substance is pure potash or potassa, which was unknown in its uncombined state till I discovered potassium, but which has long been familiar to chemists combined with water in the substance which has been called pure potash; but which ought to be called the hydrat of potassa. 1846 G. E. Day tr. J. F. Simon Animal Chem. II. 128 If..caustic potash be added to the mass, a considerable quantity of ammonia is given off... When the acid is accurately neutralized with potash, it forms an easily-soluble salt. 1869 H. E. Roscoe Lessons Elem. Chem. (new ed.) xix. 185 Thrown into water, one atom of potassium displaces one of hydrogen from the water, forming potassium hydroxide, or potash, KHO. 1922 T. M. Lowry Inorg. Chem. ix. 103 (caption) The gas..bubbles through a short column of strong potash. 1955 B. C. L. Kemp Elem. Org. Chem. (new ed.) vi. 89 If caustic potash is used for saponification, the product is soft soap. 1985 R. A. E. North Cleaning Professional Kitchens (BNC) 26 Since most soils requiring removal are alkali soluble the active base of a machine detergent tends to be sodium hydroxide (caustic soda) or potassium hydroxide (caustic potash). extracted from potashn. < as lemmas
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