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Updated: June 9, 2025
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.
Truly chemistry works wonders. Take ethyl alcohol, or ordinary spirits of wine, and add four more atoms of carbon to the carbon molecule, and we have the poison carbolic acid. Pure alcohol can be turned into a deadly poison, not by adding to, but simply by taking from it; take out one atom of carbon and two of hydrogen from the alcohol molecule, and we have the poison methyl alcohol.
In this way I conceive the use of wood spirit would be both more effective and also cheaper than that of borax, besides being most suitable in the case of any kind of dyes and colours to be subsequently applied to the hats. Wood Spirit. Wood spirit, the pure form of which is methyl alcohol, is one of the products of the destructive distillation of wood.
What is its normal value? !Answer!: 0.1089 N. In standardizing a hydrochloric acid solution it is found that 47.26 cc. of hydrochloric acid are exactly equivalent to 1.216 grams of pure sodium carbonate, using methyl orange as an indicator. What is the normal value of the hydrochloric acid? !Answer!: 0.4855 N.
When boiled with baryta water, sinapine decomposes into sinapic acid, C H O , and choline, C H NO , the latter a well-known constituent of the bile, and produced also in the decomposition of the lecithin of the brain and yolk of egg. Cocaine, the alkaloid of coca leaves, is decomposed by heating with hydrochloric acid into methyl alcohol, benzoic acid, and a crystalline base, ecgonine, C H NO .
The comparison of the acid and alkali solutions was made, using methyl orange as an indicator, while the titration of the oxalic acid is made with the use of phenolphthalein. In the oxidation processes of volumetric analysis standard solutions of oxidizing agents and of reducing agents take the place of the acid and alkali solutions of the neutralization processes already studied.
Cave was so startled and so impressed by the absolute reality of these eyes, that he drew his head back from the crystal to look behind it. He had become so absorbed in watching that he was quite surprised to find himself in the cool darkness of his little shop, with its familiar odour of methyl, mustiness, and decay. And, as he blinked about him, the glowing crystal faded, and went out.
"There is no methyl, and the higher alcohols, as shown by Savalie's method, only exist in traces. The spirit is flavoured by more than one essential oil, and apparently oil of juniper is one of these oils. "The liquid contains no sugar, and leaves but a small extract. In my opinion the liquid essentially consists of a pure distilled spirit flavoured with essential oils.
Contains the poisonous principle coniine, a volatile liquid alkaloid with a mousy smell; insoluble in water; soluble in alcohol, ether, and chloroform. It also contains methyl coniine. Symptoms. Dryness of throat, headache, dilated pupil, dysphagia, loss of muscular power, passing into complete paralysis. Delirium, coma, and convulsions, occasionally. Post-Mortem Appearances.
For instance, there is the fact that we were given a bath of something by the Blue Ghost that seemed to freeze our faces. There is the fact that the Frostola man bought a quantity of methyl chloride. There is the fact that methyl chloride could have produced the effect we felt. But how can we say that it's a fact that the Frostola man somehow doused us with chemical?"
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