carbonic acidn.

1788 J. St. John tr. L. B. Guyton de Morveau et al. Method Chym. Nomencl. 129 New Names: Gas, carbonic acid [Fr. acide carbonique]... Ancient Names. Fixed air, of Dr. Black. Hales's solid air... Mephitic gas.

1796 E. Darwin Zoonomia II. 433 The patient might breathe with advantage a mixture of carbonic acid gas, or of hydrogene gas, or of azote with atmospheric air.

1844 W. H. Sleeman Rambles & Recoll. Indian Official I. xiv. 121 They have occasional beds of limestone formed apparently by springs rising from their sides, and strongly impregnated with carbonic acid gas.

1863 A. C. Ramsay Physical Geol. & Geogr. Great Brit. (1878) i. 4 The carbonic acid in the air.

1911 Science 22 Dec. 874/2 Sea water contains..four gases—oxygen. nitrogen, carbonic acid and argon.

1914 F. E. Fritsch & E. J. Salisbury Introd. Study Plants i. 10 Starch in the leaves of plants is formed, with the help of light and chlorophyll, from the carbonic acid gas (or carbon dioxide) of the air.

1973 J. Seymour & S. Seymour Self-sufficiency xi. 134 Bread is ‘leavened’ by carbonic acid gas produced by the yeast organism.

2000 A. J. Rocke in F. L. Holmes & T. H. Levere Instruments & Exper. Hist. Chem. xi. 274 Berzelius also decided to determine the two true products, water and carbonic acid, by condensed-phase capture.

1800 E. Darwin Phytologia ii. x. 175 This carbonic acid in its fluid state, or dissolved in water, not in its aerial or gasseous state.]

1867 C. L. Bloxam Chemistry 75 This supports the view entertained by some chemists, that CO₂ is not an acid until it is associated with water, and they therefore speak of it as carbonic anhydride, reserving the name carbonic acid for the as yet undiscovered compound HO.CO₂ (or HCO₃).

1870 J. D. Steele Answers to Pract. Questions Fourteen Weeks Course in Nat. Philos. 101 In this experiment the acid exchanges its hydrogen for the calcium, producing calcium chloride..on the one hand, and carbonic acid (H₂CO₃) on the other.

1909 E. I. Lewis Elements Org. Chem. ii. 16 Powdered barium carbonate..reacts with the excess sulphuric acid to form insoluble barium sulphate, and carbonic acid which decomposes.

1922 J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) xiii. 288 Carbonic acid is a dibasic acid, forming two series of salts, e.g. Na₂CO₃ and NaHCO₃.

1948 Q. Rev. Biol. 23 205/2 Two of the simplest chemical reactions known for which enzymes have been isolated are the dehydration of carbonic acid and the reduction of hydrogen peroxide.

1972 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 3) v. 176 Even protonated carbonic acid, or more properly, the trihydroxycarbonium ion, C(OH)₃⁺..has been observed.

1997 G. S. Helfman et al. Diversity of Fishes v. 60/1 The dissociating carbonic acid also causes the concentration of HCO₃ inside the red blood cell to increase.

1841 Civil Engineer & Architect's Jrnl. 4 317/1 A small piece of this carbonic acid snow was placed on the surface of water.

1914 R. A. Freeman Silent Witness xxii. 327 With Reinhardt's luggage, [he will have] gone straight on to Paris, leaving the body packed in an abundance of the carbonic acid snow.

2007 Jrnl. Amer. Coll. Surgeons 204 316/1 Solidified carbon dioxide,..or carbonic acid snow was first used by Dr William Pusey in 1907 in preference to a salt and ice mixture.