Victor -Meyer, vapour, density determination

Vapour-density Determination at Very High Temperatures.—Victor Meyer was able to extend up to 1700° the method of air displacement discovered by him, and thus to... 

Molecular Weight Determinations by Physical Methods. Vapour Density. Victor Meyer s Method. 

Nickel carbonyl is a colourless liquid, boiling at 43-2° C.5 and solidifying at — 25° C.6 Its density is 1-3185 at 17° C. At 50° C. its vapour density corresponds to the formula Ni(CO)4 when determined in Victor Meyer s apparatus.6 In an atmosphere of carbon monoxide its density is normal up to 100° C., whilst in nitrogen its dissociation is practically complete at 155° C.5... 

Determinations by Victor Meyer and his collaborators6 of the density of gaseous cuprous chloride at 1600° to 1700° C. gave values approximately 6-5 times that of the atmosphere. Taking air as unity, the vapour-density calculated from the formula Cu2Cla is 6-83. The close agreement between the two values supports the adoption of the double formula to represent the molecular constitution of gaseous cuprous chloride. 

Johann Heinrich Biltz (Berlin, 26 May 1865-Breslau, 29 October or 2 November 1943), a pupil of Victor Meyer, professor in Breslau (1911), determined the vapour densities of stannous chloride, cuprous and silver chlorides, phosphorus, sulphur, selenium, tin, arsenic, antimony and bismuth, detecting the molecule Sg. His later work was largely on organic chemistry. His brother Eugen Wilhelm Biltz (Berlin, 8 March 1877-Heidelberg, 13 November 1943) was professor in Gottingen (1900), Clausthal (1908), and Hannover. He published an immense number of papers, on colloids, the conductivities of fused salts, the compounds of ammonia with salts, compounds of beryllium and other rarer metals, sulphides, phosphides and tellurides, etc., and the molecular volumes of solid compounds. ... 

Determination of Vapour Density.—For the determination of the density of the vapour of a substance when the latter is not a gas at the ordinary temperature, the method commonly employed is that due to Victor Meyer, or the allied one due to Lumsden. 

Besides the methods of Victor Meyer and of Lumsden, others have been used for the determination of vapour densities, eg. the methods of Dumas and of Hofmann. These methods, however, although at one time frequently employed, are now seldom used and need not be further discussed. More recently,... 

Experiment.—Determine by the Victor Meyer or Lumsden method, the vapour density of acetic acid at a series of... 

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