Aids to chemistry

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Page 67 - Sobrero j more minutely investigated by Railton. Formation. By the action of a mixture of strong nitric acid and oil of vitriol on glycerine at low temperatures (Sobrero, p. 488). Preparation. Syrupy glycerine is slowly dropped into a mixture of equal volumes of strong nitric and sulphuric acids, kept cool by immersing the containing vessel in ice-cold water, the mixture being well shaken and cooled after each addition. The product which floats on the surface after a while, in the form of an oily...
Page 57 - ... Mariotte's Law, from the names of the discoverers : it states that the volume occupied by any gas is inversely proportional to the pressure to -which it is subjected. Thus, for instance, the volume I under pressure i becomes the volume 2 under the pressure £, the volume 3 under the pressure...
Page 10 - In line with the above definition we may say further that any base in which one or more of the hydrogen atoms have been replaced by non-metallic atoms or acid radicals, is a salt.
Page 53 - According to this law, the velocity of diffusion of different gases is inversely proportional to the square roots of their densities.
Page 21 - Tents for the Bismuth Compounds — (1) Sulphuretted hydrogen gives a black precipitate. (2) Solutions of these salts become milky upon the addition of water, insoluble basic compounds being formed. (3) Metallic bismuth is easily reduced from its compounds before the blow-pipe as a brittle bead.
Page 36 - If two bodies combine with a third, the proportions in which they combine with that third body are measures or multiples of the proportions in which they may combine with each other.
Page 65 - If the above liquids be left only in contact with air which has been passed through a red-hot platinum tube, and thus the living sporules destroyed ; or if the air be simply filtered by passing through cotton wool, and the sporules prevented from coming into the liquid, it is found that these fermentable liquids may be preserved for any length of time without undergoing the slightest change.— ROSCOE.
Page 40 - A solid immersed in a liquid loses a weight equal to the weight of an equal volume of the liquid.

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