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To Obtain Iodic Acid

Dis- low turmeric paper brown. The principal solve iodate of soda in sulphuric acid in con- alkalies are soda, potassa, and ammonia. The siderable excess, boil for 15 minutes, and set first has been called the mineral, the second the solution aside to crystallize. the vegetable, and the third the volatile Or: Iodine, 1 part; strongest (monohydra- alkali; but this distinction is now obsolete. ted) nitric acid, 4 parts; mix, and apply a Soda and potassa have also been called the gentle heat until the color of the iodine dis- fixed alkalies, from their permanence in the appears, then evaporate to dryness and leave fire. The alkalies are strictly metallic oxides. the residuum in the open air at a temperature The salts of the alkalies, both alone and carof about 590 Fahr. When, by attracting bonated, are generally freely soluble in water. moisture, it has acquired the consistence of a The methods for ascertaining the strength of syrup, put it into a place where the tempera- alkalies and their solutions will be found ture is higher and the air drier, when, in a few days, very fine white crystals of rhomboidal shape will form. under Alkalimetry, No. 83.