Exercises in Chemistry: Systematically Arranged to Accompany the Second Revised Edition of "An Elementary Study of Chemistry"Ginn, 1919 - 147 σελίδες |
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Σελίδα 3
... portions note the relative temperatures of different parts of the flame . Draw a diagram to illustrate your results . FIG . 2 b . To fit a tube with stopper and glass tube as shown in Fig . 2. In all operations requiring the application ...
... portions note the relative temperatures of different parts of the flame . Draw a diagram to illustrate your results . FIG . 2 b . To fit a tube with stopper and glass tube as shown in Fig . 2. In all operations requiring the application ...
Σελίδα 5
... portion thicken and the size of the bore dimin- ishes ( Fig . 8 , 4 ) . The tube must be constantly rotated , to prevent the softened portion from sagging . Now quickly remove the tube from the flame , and , holding it in a vertical ...
... portion thicken and the size of the bore dimin- ishes ( Fig . 8 , 4 ) . The tube must be constantly rotated , to prevent the softened portion from sagging . Now quickly remove the tube from the flame , and , holding it in a vertical ...
Σελίδα 6
... portion of the liquid , care being taken , however , that the flame does not strike the tube above the level of the liquid . In case the upper part of the tube becomes heated , it may be sup- ported by a test - tube holder ( Fig . 10 ) ...
... portion of the liquid , care being taken , however , that the flame does not strike the tube above the level of the liquid . In case the upper part of the tube becomes heated , it may be sup- ported by a test - tube holder ( Fig . 10 ) ...
Σελίδα 15
... portion of the mixture , say 0.5 g . , by heating it in a test tube . In the absence of impurities the oxygen is evolved quietly , unaccompanied by any very marked sparking in the materials . Place the apparatus prepared in Exercise 2 ...
... portion of the mixture , say 0.5 g . , by heating it in a test tube . In the absence of impurities the oxygen is evolved quietly , unaccompanied by any very marked sparking in the materials . Place the apparatus prepared in Exercise 2 ...
Σελίδα 19
... portion of it remains undissolved . c . Properties of hydrogen . 1. Thrust a lighted splint into a bottle of the gas held mouth downward . Slowly withdraw the splint and again thrust it into the gas . Describe the results . What do they ...
... portion of it remains undissolved . c . Properties of hydrogen . 1. Thrust a lighted splint into a bottle of the gas held mouth downward . Slowly withdraw the splint and again thrust it into the gas . Describe the results . What do they ...
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acetate alcohol ammonium hydroxide apparatus shown barium chloride beaker boiling bromide Bunsen flame calcium chloride carbon dioxide charcoal common salt compounds cool copper oxide copper sulfate cork crystals dish dissolved distilled water evaporate evaporating-dish EXERCISE experiment filter paper filtrate flask formed funnel tube glass plate glass rod glass tube hard-glass test tube hydrochloric acid insert iron laboratory limewater liquid litmus paper manganese dioxide Materials mixture mouth nitric acid Note the color Note the results odor phosphorus Place porcelain crucible potassium chlorate powdered precipitate PREPARATION AND PROPERTIES preparation of oxygen reaction red litmus paper remove residue ring stand rubber tubing screw clamp shake shown in Fig silver nitrate small beaker sodium carbonate sodium hydroxide sodium hydroxide solution solid soluble solution R. S. stand and burner starch stirring-rod stopper strips sulfuric acid temperature test tube volume watch glass weight wide-mouthed bottle wire wooden splint zinc
Δημοφιλή αποσπάσματα
Σελίδα 136 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Σελίδα 33 - Put one fourth of a test tube full of bone black into a small flask and pour over it about 50 cc. of water, to which has been added a few drops of a solution of litmus or of indigo.
Σελίδα 135 - Measures of Length 10 millimeters (mm) =1 centimeter cm 10 centimeters =1 decimeter dm 10 decimeters =1 meter m 10 meters =1 dekameter Dm 10 dekameters =1 hektometer Hm 10 hektometers =1 kilometer Km...
Σελίδα 134 - Aluminium Antimony Arsenic Barium Bismuth Boron Bromine Cadmium Calcium Carbon Chlorine Chromium Cobalt Copper Fluorine Gold Hydrogen Iodine Iron Lead Lithium Magnesium Manganese Mercury Nickel Nitrogen Oxygen Phosphorus Platinum Potassium Silicon Silver Sodium Strontium Sulphur Tin Zinc Sym.
Σελίδα 83 - Phosphorous acid. Pour into a test tube about 0.5 cc. of phosphorus trichloride (hood) and add a little water, a drop at a time. What gas is evolved (R) ? Finally, add about 5 cc. of water, pour the liquid into an evaporatingdish, and evaporate to a sirupy mass. Dilute this with a little water, transfer the solution to a test tube, and add a few drops of a solution of silver nitrate. Boil the resulting mixture. A black precipitate forms. Explain.