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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Αποτελέσματα 1 - 5 από τα 57.
Σελίδα 3
... gently pull the glass apart , at the same time exerting a slight pres- sure with the thumbs . If the tube does not yield readily to a gentle pressure , a deeper scratch must be made . In the case of large tubing it may be found ...
... gently pull the glass apart , at the same time exerting a slight pres- sure with the thumbs . If the tube does not yield readily to a gentle pressure , a deeper scratch must be made . In the case of large tubing it may be found ...
Σελίδα 4
... gently rotat- ing it so that all sides may be equally heated . Continue the heating until the glass bends easily ... gentle pressure ( Fig . 6 ) ; then 4 A Study of Some of the Changes taking Place when Substance Burns.
... gently rotat- ing it so that all sides may be equally heated . Continue the heating until the glass bends easily ... gentle pressure ( Fig . 6 ) ; then 4 A Study of Some of the Changes taking Place when Substance Burns.
Σελίδα 5
... gentle pressure ( Fig . 6 ) ; then reverse the cork and bore through from the other end . Care must be taken to keep the borer at a right angle to ... gently pull the ends apart until the bore 5 Chemical Action; Elements, Compounds, Mixtures.
... gentle pressure ( Fig . 6 ) ; then reverse the cork and bore through from the other end . Care must be taken to keep the borer at a right angle to ... gently pull the ends apart until the bore 5 Chemical Action; Elements, Compounds, Mixtures.
Σελίδα 6
... gently pull the ends apart until the bore is of the desired size ( Fig . 8 , B ) . The glass jet is then formed by cutting the tube at B and rounding the edges in a flame . EXERCISE 3 SOME PRELIMINARY MANIPULATIONS Apparatus . Test ...
... gently pull the ends apart until the bore is of the desired size ( Fig . 8 , B ) . The glass jet is then formed by cutting the tube at B and rounding the edges in a flame . EXERCISE 3 SOME PRELIMINARY MANIPULATIONS Apparatus . Test ...
Σελίδα 9
... gently . The liquid may be made to simmer , but should not actually boil ( ? ) . Withdraw the heat as soon as the water is evaporated . Note the residue left . Convince yourself that it is common salt . EXERCISE 4 A STUDY OF SOME OF THE ...
... gently . The liquid may be made to simmer , but should not actually boil ( ? ) . Withdraw the heat as soon as the water is evaporated . Note the residue left . Convince yourself that it is common salt . EXERCISE 4 A STUDY OF SOME OF THE ...
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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.