IV.

TABLE

OF THE

MORE FREQUENTLY OCCURRING FORMS AND COMBINATIONS OF THE SUBSTANCES TREATED OF IN THE

PRESENT WORK,

ARRANGED

WITH ESPECIAL REGARD TO THE CLASS TO WHICH THEY RESPECTIVELY BELONG ACCORDING TO THEIR SOLUBILITY

IN WATER, IN HYDROCHLORIC ACID, IN NITRIC ACID, OR IN NITROHYDROCHLORIC ACID.

PRELIMINARY REMARKS.

The class to which the several compounds respectively belong according to their solubility in water or acids (see § 177), is expressed by figures. Thus 1 or I means a substance soluble in water; 2 or II a substance insoluble in water, but soluble in hydrochloric acid, nitric acid, or nitrohydrochloric acid; 3 or III a substance insoluble in water, in hydrochloric acid, and in nitric acid. For those substances which stand as it were on the limits between the various classes, the figures of the classes in question are jointly expressed: thus 1-2 signifies a substance difficultly soluble in water, but soluble in hydrochloric acid or nitric acid; 1-3 a body difficulty soluble in water, and of which the solubility is not increased by the addition of acids; and 2-3 a substance insoluble in water, and difficultly soluble in acids. Wherever the deportment of a substance with hydrochloric acid differs materially from that which it exhibits with nitric acid, this is stated in the notes.

The Roman figures denote officinal and more commonly occurring compounds.

The haloid salts and sulphur compounds are placed in the columns of the corresponding oxides. The salts given are, as a general rule, the neutral salts; the basic, acid, and double salts, if officinal, are mentioned in the notes; the small figures placed near the corresponding neutral or simple salts refer to these.

Cyanogen, chloric acid, citric acid, malic acid, benzoic acid, succinic acid, and formic acid, are of more common occurrence in combination with a few bases only, and have therefore been omitted from the table. The most frequently occurring compounds of these substances are: cyanide of potassium I, ferrocyanide of potassium I, ferricyanide of potassium I, sesqui-ferrocyanide of iron (Prussian blue) III, ferrocyanide of zinc and potassium II-III, chlorate of potassa I, the citrates of the alkalies I, the malates of the alkalies I, malate of sesquioxide of iron I, the benzoates of the alkalies I, the succinates of the alkalies I, and the formates of the alkalies I.

ther

INDEX OF THE SOLUBILITY OF

KO NAO NH, O BaO Sro CaO MgO Al, 0, MnO FeO Fe, 0, CoO | NiO ZnO

4. Tartarized borax (bitartrate of potassa and borate of soda) I.

5. Bitartrate of potassa I-II.

6. Tartrate of potassa and ammonia I.

7. Tartrate of potassa and soda I.

8. Tartrate of potassa and sesquioxide of iron I.

9. Tartrate of antimony and potassa I.

10. Phosphate of soda and ammonia I.

11. Bicarbonate of soda I.

12. Sesquichloride of iron and chloride of ammonium J.

13. Sulphate of alumina and ammonia I.

14. Basic phosphate of lime II.

15. Sulphide of cobalt is pretty readily decomposed by nitric acid, but

very difficultly by hydrochloric acid.

officinal.

This substance is not

16. The same applies to sulphide of nickel.

17. Sulphide of zinc is readily soluble in nitric acid, somewhat more difficultly soluble in hydrochloric acid.

18. Minium is converted by hydrochloric acid into chloride of lead; by nitric acid into oxide, which redissolves in an excess of the acid, and into brown binoxide of lead, which is insoluble in nitric acid.

19. Trisacetate of lead I.

20. Proto- and bisulphide of tin are decomposed and dissolved by hydrochloric acid; by nitric acid they are converted into binoxide, which is insoluble in an excess of the acid. Sublimed bisulphide of tin dissolves only in nitrohydrochloric acid.

21. Basic nitrate of teroxide of bismuth II.

22. Ammoniated oxide of copper 1.

23. Sulphide of copper is difficultly decomposed by hydrochloric acid, but with facility by nitric acid.

24. Chloride of copper and ammonium I. 25. Sulphate of copper and ammonia I.

26. Basic acetate of copper, partially soluble in water, and completely

in acids.

27. Basic nitrate of suboxide of mercury and ammonia II.

28. Ammonio-chloride of mercury II.

29. Basic sulphate of oxide of mercury II.

30. Sulphide of silver soluble only in nitric acid.

31. Bisulphide of platinum is not affected by hydrochloric acid, and but little by boiling nitric acid; it dissolves in hot nitrohydrochloric acid.

32. Bichloride of platinum and chloride of potassium 1—3.

33. Bichloride of platinum and chloride of ammonium 1—3.

34. Terchloride of gold and chloride of sodium I.

35. Teroxide of antimony is soluble in hydrochloric acid, but not in

nitric acid.

36. Tersulphide of antimony and sulphide of calcium I-II.

37. Basic terchloride of antimony II.

38. Tartrate of teroxide of antimony and potassa I.