Exercises in Chemistry: Systematically Arranged to Accompany the Second Revised Edition of "An Elementary Study of Chemistry"Ginn, 1919 - 147 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 20.
Σελίδα 3
... application of a strong heat to glass , the heat must be applied gently at first . Highly heated glass must be cooled slowly ; otherwise it is easily broken . FIG . 3 From one of the lengths of soft - glass tubing cut a piece about 15 ...
... application of a strong heat to glass , the heat must be applied gently at first . Highly heated glass must be cooled slowly ; otherwise it is easily broken . FIG . 3 From one of the lengths of soft - glass tubing cut a piece about 15 ...
Σελίδα 6
... apply heat until the water boils rapidly . To do this , hold the test tube between the thumb and fingers O FIG . 9 FIG . 10 FIG . 11 ( Fig . 9 ) , constantly rotating it so as to apply the heat uni- formly . The heat should be applied ...
... apply heat until the water boils rapidly . To do this , hold the test tube between the thumb and fingers O FIG . 9 FIG . 10 FIG . 11 ( Fig . 9 ) , constantly rotating it so as to apply the heat uni- formly . The heat should be applied ...
Σελίδα 13
... apply a gentle heat to the oxide . The tube must be rotated constantly , to distribute the heat ; otherwise it may be melted . During the heating insert a glowing splint from time to time into the mouth of the tube . Note the result ...
... apply a gentle heat to the oxide . The tube must be rotated constantly , to distribute the heat ; otherwise it may be melted . During the heating insert a glowing splint from time to time into the mouth of the tube . Note the result ...
Σελίδα 15
... applying the flame so that both tubes are equally heated . Repeatedly thrust a glowing splint into each tube in order to detect any oxygen that may be evolved . Note the results . What effect has the manganese dioxide ? Does the ...
... applying the flame so that both tubes are equally heated . Repeatedly thrust a glowing splint into each tube in order to detect any oxygen that may be evolved . Note the results . What effect has the manganese dioxide ? Does the ...
Σελίδα 35
... apply a very gentle heat , moving the burner about with the hand . As soon as the action begins , withdraw the heat . After the air has been expelled from the apparatus , fill three bottles ( 250 - cc . ) with the gas . If the action ...
... apply a very gentle heat , moving the burner about with the hand . As soon as the action begins , withdraw the heat . After the air has been expelled from the apparatus , fill three bottles ( 250 - cc . ) with the gas . If the action ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
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.