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Many dyspeptics take an inordinate amount of bicarbonate of soda, an excellent corrective to acidity of the stomach when partaken of occasionally, and in small portions. In some cases, large and frequent doses have produced a cancerous condition of the coating of the stomach, which has resulted in death.
Supposing, however, we continued to pass carbonic acid gas into that water, rendered milky with chalk powder, very soon the liquid would clear, and we should get once more a solution of lime, but not caustic lime as it was at first, simply now a solution of carbonate of lime in carbonic acid, or a solution of bicarbonate of lime.
Add, as well, a pinch of bicarbonate of soda. Make the paste into a ball, and cover it with a fine linen or muslin cloth, and leave it till the following day. If you have no molds to press it in, cut it into diamonds or different shapes, and cook them in the oven on buttered trays. I believe waffle irons can be bought in London. Then beat up the whites of four eggs very stiffly, and add them.
In titrating solutions of alkali carbonates in the presence of phenolphthalein, the color change takes place when the carbonate has been converted to bicarbonate. In the presence of methyl orange, the color change takes place only when the carbonate has been completely neutralized. From the following data, calculate the percentages of Na CO and NaOH in an impure mixture.
Dissolve 3 grams of sodium bicarbonate in 200 cc. of water in a 500 cc. beaker, and pour the cold solution of the antimony chloride into this, avoiding loss by effervescence. This is usually expelled by the heating upon the water bath; but if it is not wholly driven out, a point is reached during dilution at which the antimony sulphide, being no longer held in solution by the acid, separates.
If now, however, carbonic acid be blown into the two solutions, that in the first jar, containing the phenolphthalein, becomes colourless as soon as the monocarbonate of soda is converted into bicarbonate, and this disappearance of the rose colour indicates acidity; the blue solution in the jar containing litmus, on the other hand, is not altered by blowing in carbonic acid.
If this drug is combined with sodium bicarbonate, the disintegration into its component parts would be likely to occur in the stomach.
The bicarbonate is in colourless prisms, which have a saline, feebly alkaline taste, and are not deliquescent. Symptoms. Acrid soapy taste in mouth, burning in throat and gullet, acute pain at pit of stomach, vomiting of bloody or brown mucus, colicky pains, bloody stools, surface cold, pulse weak. These preparations are not volatile, so that there is not much fear of lung trouble.
As to caustic potash, it has a great affinity for carbonic acid mixed in air, and it is sufficient to shake it in order for it to seize upon the acid and form bicarbonate of potash. So much for the absorption of carbonic acid. By combining these two methods they were certain of giving back to vitiated air all its life-giving qualities. The two chemists, Messrs.
As the reaction between sodium thiosulphate and iodine is not always free from secondary reactions in the presence of even the weakly alkaline bicarbonate, it is best to avoid the addition of any considerable excess of iodine.
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