Which with baryta gave chloroform and maleic acid.
The barium and magnesium salts of this acid are formed when baryta and magnesia are fused with cobalt sesquioxide.
To purify the oxide, it is dissolved in dilute hydrochloric acid until the acid is neatly neutralized, the solution is cooled, filtered, and baryta water is added until a faint permanent white precipitate of hydrated barium peroxide appears; the solution is now filtered, and a concentrated solution of baryta water is added to the filtrate, when a crystalline precipitate of hydrated barium peroxide, Ba0 2 8 H 2 0, is thrown down.
Fischer, by the action of baryta water, obtained the synthetic sugars aand 0-acrdse (Berichte, 1889, 22, p. 360).
Thallous hydroxide, T10H, is most conveniently prepared by decomposing the solution of the sulphate with baryta water.
Rubidium hydroxide, RbOH, is a colourless solid which is formed by the action of rubidium on water, or by the addition of baryta water to a solution of rubidium sulphate.
Cyclo-heptanone (suberone), C 7 H 12 O, is formed on the distillation of suberic acid with lime, and from a-brom-cyclo-heptane carboxylic acid by treatment with baryta and subsequent distillation over lead peroxide (R.
Hydrolysis with baryta water gives acetic and salicylic acids.
Uvitic acid, 5-methyl isopthalic acid, is obtained by oxidizing mesitylene or by condensing pyroracemic acid with baryta water.
Hypophosphorous acid, HP(OH) 2, discovered by Dulong in 1816, and obtained crystalline by Thomson in 1874 (Ber., 7, P. 994), is prepared in the form of its barium salt by warming phosphorus with baryta water, removing the excess of baryta by carbon dioxide, and crystallizing the filtrate.