Liquids weighing

A. Preparation of Thiocarbonyl Per chloride.—In a 5-I. bottle arranged for cooling by running water is placed 500 g. (6.58 moles) of dry carbon disulfide (Note i) to which 0.5 g. of iodine has been added. Dry chlorine is passed into the cooled carbon disulfide at such a rate that the temperature does not rise above 25°, until the liquid weighs 1770 g. (17.9 moles chlorine) (Note 2). The time required is about forty hours. The product is a deep red liquid, a mixture of impure thiocarbonyl perchloride and sulfur chloride. 

Example The liquid that fills a certain container weighs 1496.6 pounds. The container is 4 feet long, 3 feet wide and 2 feet deep. Its volume is 24 cubic feet (4 ft x 3 ft x 2 ft). If 24 ft of this liquid weighs 1497.6 pounds, then 1 cubic foot weighs ... 

A pycnometer filled with an organic liquid weighs 45.2316 g. Filled with water at 26.4°C the pycnometer weighs 48.2386 g. The empty pycnometer weighs 21.2323 g. What is the density of the unknown liquid What is its specific gravity ... 

For the determination of halogen in liquids weigh the substance in the manner described for C and H determination and introduce the weighing tube into the combustion tube in such a way that the former rests about 8-10 cm. beyond the front end of the long wire gauze roll. For liquids which burn with very great difficulty substitute ammonium nitrate for the potassium chlorate. 

In a Hanovia 550-watt immersion photochemical reactor (Note 1) equipped with a magnetic stirrer and water condenser (Note 2) are placed 1 1. of diethyl ether, 180 g. (1.96 moles) of bicyclo[2.2. l]hepta-2,5-diene (Note 3), and 8 g. of acetophenone. The system is flushed briefly with a stream of nitrogen and then irradiated for a,bout 36-48 hours (Note 4). After irradiation, the ether is removed by distillation through a 20-cm. Vigreux column (Note 5). The residue, a clear liquid weighing about 185 g., is distilled through a spinning-band column under reduced pressure (Note 6). Quadricyclane is obtained as a colorless liquid, b.p. 70° (200 mm.). The yield is 126-145 g. (70-80%) (Note 7). 

The suspension is transferred to a 5-1. three-necked round-bottomed flask and subjected to steam distillation until 7-10 1. are collected (Note 10). The toluene layer is removed, and the aqueous layer is extracted with 1 1. of fresh toluene. The combined toluene layers are agitated for 30 minutes with a solution of 26 g. of sodium bisulfite in 500 ml. of water (Note 11). The toluene layer is washed with water, and the solvent is removed at water-pump pressure on the steam bath. The resulting orange liquid weighs 107-120 g. (65-74%) 1.5250-1.5270, and is... 

At 0.3 mm/Hg the fraction boiling at 95-105 °C was a yellow liquid weighing 28.5 g which was largely 3-ethoxy-2-(ethylthio)anisole which seemed to be reasonably pure chromatographically. It was used as such in the bromination step below. 

When in doubt about particular data values, it is always advisable to refer to the original literature values. Unfortunately, this does not always solve the problem since these values can have mistakes as well. One common problem can be the incorrect electronic file translation from one computer system to another. For example, certain software products (even by the same manufacturer) incorrectly convert micro from one system to milli in another. Another potential pitfall is the erroneous association of milliliter with milligram. At a density of 1.0, 1 ml of liquid weighs 1000 mg, or 1 g,... 

Thus in addition to the data required to determine the surface excess amount (cf. Section 3.3.1), one needs to know dQKV (the heat exchanged reversibly during each adsorption step) and Vc (the volume - dead space - of that part of the adsorption bulb which is located within the calorimetric detector (cf. Figure 3.15). Vc is evaluated by liquid weighing or by geometrical considerations and corrected for the sample volume. 

A mixture of 1 part by volume of acetic acid and 4 parts by volume of acetone were at a temperature of 700° C. and at a velocity of 5 to 7 cc. per minute passed through a tube made of porcelain and filled with pieces of crushed porcelain. Using 360 ccs. (304 Gr.) of the aforesaid mixture, the reaction products consisted of a liquid weighing 271 grams and 41.1 litres (at 25° C.) of gas weighing 34.7 grams. 

Suppose that a student finds that 23.50 mL of a certain liquid weighs 35.062 g. What is the density of this liquid ... 

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