Manual of Qualitative Chemical Analysis
Manual of Qualitative Chemical Analysis
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5. A mixture of alcohol^ ammonia^ and barium or calcium chloride^ produces no precipitate in solutions of benzoic acid or of the alkali benzoates (diflference from succinic acid).
6. In relation to the microscopic detection of benzoic acid, see Haushofeb, p. 71.
§204.
c. Sauctlio Acid, HC,H,0,.
1. Salicylic acid crystallizes in colorless, odorless prisms.
It dissolves only slightly in cold water, but more readily in hot water ; 1 part requires for solution 666 parts of water at 0°, 370 parts at... 20^ and 12.6 parts at lOO'' (Boubgoin). It dis- solves very abundantly in alcohol and in ether, and also in amyl alcohol and chloroform. It fuses at 155°, and with care- ful heating sublimes unchanged in needles. When heated quickly and strongly, it is partly decomposed into carbonic §204.] SALICYLIC ACID. 411 acid and plienol. When an aqueous solntion of salicyli(i acid is boiled, the acid volatilizes in considerable quantity. The aqueous solution gives a distinctly acid reaction. By the action of strong nitric acid upon salicylic acid, with the aid of heat, nitro-salicylic acids are produced.
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You can find similar books in the "Read Also" column, or choose other free books by C Remigius Fresenius to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
5. A mixture of alcohol^ ammonia^ and barium or calcium chloride^ produces no precipitate in solutions of benzoic acid or of the alkali benzoates (diflference from succinic acid).
6. In relation to the microscopic detection of benzoic acid, see Haushofeb, p. 71.
§204.
c. Sauctlio Acid, HC,H,0,.
1. Salicylic acid crystallizes in colorless, odorless prisms.
It dissolves only slightly in cold water, but more readily in hot water ; 1 part requires for solution 666 parts of water at 0°, 370 parts at... 20^ and 12.6 parts at lOO'' (Boubgoin). It dis- solves very abundantly in alcohol and in ether, and also in amyl alcohol and chloroform. It fuses at 155°, and with care- ful heating sublimes unchanged in needles. When heated quickly and strongly, it is partly decomposed into carbonic §204.] SALICYLIC ACID. 411 acid and plienol. When an aqueous solntion of salicyli(i acid is boiled, the acid volatilizes in considerable quantity. The aqueous solution gives a distinctly acid reaction. By the action of strong nitric acid upon salicylic acid, with the aid of heat, nitro-salicylic acids are produced.
What to read after Manual of Qualitative Chemical Analysis?
You can find similar books in the "Read Also" column, or choose other free books by C Remigius Fresenius to read onlineMoreLess
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