Chemical Reagents: Their Purity and Tests, Authorized Translation of Prüfung Der Chemischen Reagenzien Auf Reinheit (2. Aufl.)

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Merck & Company, 1914 - Chemical tests and reagents - 199 pages
 

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Page 183 - Chlorine Chromium Cobalt Columbium Copper Dysprosium Erbium Europium Fluorine Gadolinium Gallium Germanium Gold Hafnium Helium Holmium Hydrogen Indium Iodine Iridium Iron Krypton Lanthanum Lead Lithium Lutecium Magnesium Manganese Mercury...
Page 183 - ... Palladium Phosphorus Platinum Potassium Praseodymium . Radium Rhodium Rubidium Ruthenium Samarium Scandium Selenium . . . Silicon Silver Sodium Strontium Sulphur Tantalum . . Tellurium Terbium Thallium . Thorium Thulium Tin Titanium. . . . Tungsten Uranium Vanadium Xenon Ytterbium...
Page 183 - Ra Rn Re Rh Rb Ru Sm Sc Se Si Ag Na Sr S Ta Te Tb Tl Th Tm Sn Ti W U V Xe Yb Y Zn Zr...
Page 164 - ... alcohol and 50 cc. of water), and evaporate to about 180 cc. while passing in a current of pure air, free from carbon dioxide. Allow to cool to the ordinary temperature, add 5 gm.
Page 107 - When globules of mercury are dropped upon white paper, they should roll about freely, retaining their globular form, and leaving no streaks or traces. It should be perfectly dry and present a bright surface.
Page 140 - ... stannosulphate in a solution of 5 gm. of sodium bicarbonate and 5 gm. of potassium and sodium tartrate in 100 cc. of water, and titrate the clear liquid with decinormal iodine, using starch solution as the indicator. 1 cc. of decinormal I = 0.019471 gm. of K2Sn(SO4)2, log. 28939. POTASSIUM SULPHATE K2SO4. Mol. Wt. 174.36. « White, hard crystals, soluble in 10 parts of cold, and in 4 parts of boiling, water, but insoluble in alcohol. The aqueous solution is neutral to litmus paper. TESTS OF PURITY...
Page 115 - C., dissolve in 10 cc. of hydrochloric acid in a small porcelain dish, and evaporate the solution to dryness on a water bath. Dissolve the residue in 10 cc. of hydrochloric acid, and again evaporate to dryness on a water bath, continuing the heat until the residue, when redissolved in distilled water, is neutral to litmus paper.
Page 116 - Diresorcin. — Heat to boiling a solution of 0.1 gm. of phloroglucin in 10 mils of acetic anhydride, cool the solution and superimpose it upon 10 mils of sulphuric acid.
Page 108 - ... in 16 parts of cold, and in 3 parts of boiling water, in 2^ parts of cold, and in 1^ of boiling alcohol, or in 3 parts of ether.
Page 117 - ... sulphate of protoxide of iron in excess ; this will reduce the terchloride to metallic gold, which will separate in the form of a fine brownish-black powder ; wash the powder in a small flask, and redissolve it in nitrohydrochloric acid ; evaporate the solution to dryness on the water-bath, and dissolve the residue in 30 parts of water. If the gold was alloyed with silver, the latter metal remains as chloride upon treating the alloy with nitrohydrochloric acid. In that case evaporate the solution...

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