. An introduction to practical pharmacy [microform] : designed as a textbook for the student and as a guide to the physician and pharmaceutist : with many formulas and prescriptions . ix to 3j- Fie. 185. Potassce Bicarbonas, U. S. Made by passing carbonic acid gas (generated by the action ofmuriatic acid on chalk or marble) into a solution of carbonate ofpotassa unto saturation, then crystallizing. Fig. 185 shows the process of generating this gas in the bottle a,washing it by passing it through water in the bottle b, by means of the pipe c?, which passes through apipe e, of large bore to the
. An introduction to practical pharmacy [microform] : designed as a textbook for the student and as a guide to the physician and pharmaceutist : with many formulas and prescriptions . ix to 3j- Fie. 185. Potassce Bicarbonas, U. S. Made by passing carbonic acid gas (generated by the action ofmuriatic acid on chalk or marble) into a solution of carbonate ofpotassa unto saturation, then crystallizing. Fig. 185 shows the process of generating this gas in the bottle a,washing it by passing it through water in the bottle b, by means of the pipe c?, which passes through apipe e, of large bore to the bottom;and, finally, through /, conductingit into the solution of carbonate ofpotassa in c. The point of satura-tion maybe judged proximately bythe bubbles of gas leaving the pipe/, ceasing to diminish in size asthey escape through c. Bicarbonate of potassa is in largetransparent crystals, with a mildalkaline taste, soluble in about fourparts of water. The bicarbonates do not precipitate sulphate ofmagnesia, by which they may be known if fully bicarbonated. Bybeing calcined, this salt loses grains of water and carbonic acid,forming the pure carbonate of the POTASSA CARBONAS PURUS. 335 This salt is remarkable among the alkaline carbonates for its con-stancy of composition, being, in a crystalline form, invariably repre-sented by the formula KO,2COa + HO, and is directed in the Phar-macopoeia as the test to ascertain the strength of acids, which itneutralizes in the ratio of their strength. The following tableexhibits the proportion of bicarbonate of potassa, which neutralizes100 grains of each of the acids named:— Acetic acid, 60Citric acid, acid, acidSulphuric Diluted Diluted, , 25. As a medicine, bicarbonate of potassa acts as a direct and efficientantacid; pleasanter and more efficient than bicarbonate of soda. _ Itreadily neutralizes free acid in the stomach, and the excess beingabsorbed renders the blood and ur
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectpharmacy, bookyear185
