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It should be added in slight excess only, since the excess must be removed by boiling, which is tedious. !Method C! PROCEDURE. Weigh out into 500 cc. beakers two portions of 0.175-0.200 gram each of pure arsenious oxide. Dissolve each of these in 10 cc. of sodium hydroxide solution, with stirring. Cover the beakers before adding the bicarbonate, to avoid loss.
Furthermore, if to the colourless solution containing phenolphthalein, and which is acid towards that reagent, a little reddened litmus is added, this is still turned blue, and so still indicates the presence of alkali. We have, therefore, in bicarbonate of soda a salt which behaves as an acid to phenolphthalein and as an alkali to litmus.
"Here, take some of this," said the concierge as she emptied into the water that Gervaise was using the remains of a package of bicarbonate of soda. She offered her also some eau de Javelle, but the young woman refused. It was only good, she said, for grease spots and wine stains. "I thought him somewhat dissipated," said Mme Boche, referring to Lantier without naming him.
They were in a fantastic gorge, through which ran a road blasted from solid rock, stained brown and blue by the minerals in the water that bubbled there and had carved the stone in eccentric patterns. Bicarbonate of soda and sulphur thickened the heavy air and encrusted the edges of the spring with yellow scum. A fitting scene for a deadly battle, amid smells of sulphur and brimstone!
It has been suggested that the tendency to subsequent efflorescence may be corrected by boiling the plates, intended for silvering, for a couple of minutes, in a 10 per cent. solution of sodium carbonate or bicarbonate. We have no experience with the process, however. National Druggist.
And as we talked we were startled by a gun-shot and a sudden, barbaric outcry. I believe we all changed colour; but it was only the king firing at a dog and the chorus striking up in the Speak House. A day or two later I learned the king was very sick; went down, diagnosed the case; and took at once the highest medical degree by the exhibition of bicarbonate of soda.
This process depends upon the fact that when carbonic acid is forced, under pressure, into a saturated solution of ammonia and common salt, sodium bicarbonate is precipitated, whilst ammonium chloride or "sal-ammoniac" remains dissolved in the solution.
She knew the mistress of the establishment, a delicate woman who sat in a cabinet with glass doors, surrounded by soap and bluing and packages of bicarbonate of soda. As Gervaise passed the desk she asked for her brush and beater, which she had left to be taken care of after her last wash. Then having taken her number, she went in.
They are: Distillation, carbonate of soda, boiling, lime. Of these processes the first and second are the most effective, but owing to their expense are not applicable on a large scale. The third and fourth processes are efficient only with certain classes of water, rendered hard by the presence of the bicarbonate of lime, magnesia, or iron.
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