The book Experimental Chemistry for Junior Students Pt. 3 was written by author James Emerson Reynolds Here you can read free online of Experimental Chemistry for Junior Students Pt. 3 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Experimental Chemistry for Junior Students Pt. 3 a good or bad book?
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The crude mercury is filtered through linen, and is then sent into commerce in stout bottles of wrought fa-on. Experiment 450. — Introduce some crude mercury 92 Experimental Chemistry, into a small retort, and apply heat. When the tem- perature reaches 357° C the mercury boils, and the vapour condenses in the neck of the retort and trickles into a receiver. It is difficult to avoid * bumping * as the liquid boils, but a steady tempera- ture best secures a regular ebullition. Any impurities, suc...h as lead, zinc, copper, &a, are left in the retort, and the distillate is pure mercury. The impurities just referred to when present in mercury maike a globule * tail * when allowed to run along a board ; this is due to the rapid oxidation of the impurities, whereby a scum of oxide of lead, zinc, &a, is formed, and this interferes with the free movement of the drop which is then drawn out to a pear-shaped form. Distillation is the best mode of purification, though occasional agitation during several days with a solution of mercuric nitrate (see Experi- ment 456) is also effectual when rapid treatment is not necessary.
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