Experimental chemistry for junior students, Parte1 |
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afford already apparatus atomic weight beaker body boiling bottle burns c.cs c.grs calcium calcium chloride carbonic acid centi centigrams chemical action chemical change chloride closed limb cold colour combustion common salt containing cooled copper cork criths cubic centimeters cylinder decomposition delivery tube dilute dioxide dissolve easily effervescence electrolysis element evolved Experiment filled flame flask formula gases glass tube grams H₂O heat hydrate hydro hydrochloric acid hydrogen hydrogen gas invert iron jar of oxygen latter lime liquid magnesium Magnesium oxide manganese melting mercury metal mixture molecular weight molecule obtained oil of vitriol oxide oxygen oxygen gas ozone passes peroxide phosphorus piece platinum plunge potassium chlorate powder pressure produced proportions pure remove result shown in fig silver nitrate small quantity Sodium solid soluble solution specific gravity steam stopcock sulphate sulphuric acid takes temperature test paper test tube tion trough vapour vessel water-gas wire zinc
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Página 98 - F is filled with hypobromhe solution by suction above E, while the small glass tube opening on the under side of ¡the cork is closed by a finger; the clip is then applied. The exterior of the pipette is now washed with a little water, and the cork, with the apparatus attached, is then replaced in position ; the tube D again immersed in the water of the large cylinder, and the connection between E and с securely made.
Página 97 - ... graduation cannot be conveniently carried beyond fifths of a cubic centimetre. At the point shown an india-rubber tube g is attached, which can be closed at will either by a good clip or by a stopper of glass rod. The glass side tube c serves to connect the measuring apparatus in the manner shown with the generating vessel D, which is a long and wide glass tube placed within the cylinder. The glass T tube E is connected by means of rubber tubing with c, while one limb passes through the indiarubber...
Página iii - Experimental Chemistry for Junior Students. By J. EMERSON REYNOLDS, MD, FRS, Professor of Chemistry, University of Dublin ; Examiner in Chemistry, University of London.
Página 99 - ... india-rubber tube connected with the pipette; the reagent then falls from a considerable height, and mixes thoroughly with the liquid at the bottom of the tube D. Nitrogen is evolved and displaces water from c, the water being maintained at the same level in both limbs of the U tube by allowing the liquid displaced to run off by means of the tap T. When the evolution of gas has ceased, the water level is adjusted by means of the tap, and the volume of gas produced in the reaction then read off...
Página 97 - ... in length. The graduation cannot be conveniently carried beyond fifths of a cubic centimetre. At the point shown an india-rubber tube g is attached, which can be closed at will either by a good clip or by a stopper of glass rod. The glass side tube c serves to connect the measuring apparatus in the manner shown with the generating vessel D, which is a long and wide glass tube placed within the cylinder. The glass T tube E is connected by means of rubber tubing with c, while one limb passes through...
Página 98 - Before making the connection the water in the graduated tube should stand at the zero of the scale, but after making the joint the pressure within the apparatus is usually greater than that without. As the air in the tube D cools down to the temperature of the surrounding water, contraction takes place ; but should the water not return to the zero, equilibrium is at once restored by opening the fine indiarubber tube g for a few seconds, and then closing in such a manner as to prevent any possible...