Chemical lecture experiments . es of a seri-ous nature. The burn should immediately be washed inwater and moistened with sodium bicarbonate or a dilutesolution of bleaching-powder. Burning phosphorus should be extinguished as directedin Ex. 8. 2. Melting and casting phosphorus. — Commercial phos-phorus is ordinarily obtained in the form of sticks. Sinceafter keeping for some time, especially on exposure to thelight, the phosphorus acquires a dark color, it is desirable toshow the translucent, waxy appearance of pure phosphorusby melting the commercial material andrecasting it in sticks of conv
Chemical lecture experiments . es of a seri-ous nature. The burn should immediately be washed inwater and moistened with sodium bicarbonate or a dilutesolution of bleaching-powder. Burning phosphorus should be extinguished as directedin Ex. 8. 2. Melting and casting phosphorus. — Commercial phos-phorus is ordinarily obtained in the form of sticks. Sinceafter keeping for some time, especially on exposure to thelight, the phosphorus acquires a dark color, it is desirable toshow the translucent, waxy appearance of pure phosphorusby melting the commercial material andrecasting it in sticks of convenient size. Several sticks of phosphorus are placedin a beaker and completely coveredwith water. The beaker is then placedin an evaporating-dish partially filledwith water, whichis brought nearly to \ ^3 the boiling the water inthe beaker becomes warm, the phosphorus melts and settles to the bottom ofthe beaker. The phosphorus is best cast in small thin-glasstest-tubes, which are filled with water and immersed in a.
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