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 10
... shake the contents . Note any change in the appearance of the limewater . FIG . 17 Clean and dry the bottle and repeat the experiment , but omit holding the bottle over the candle flame . What conclusions do you draw from the experiment ...
... shake the contents . Note any change in the appearance of the limewater . FIG . 17 Clean and dry the bottle and repeat the experiment , but omit holding the bottle over the candle flame . What conclusions do you draw from the experiment ...
Σελίδα 17
... shake the con- tents thoroughly . After a few minutes , filter off the solid matter ( what is it ? ) , repeating the filtration , if necessary , in order to obtain a perfectly clear filtrate . Evaporate about one third of the liquid ...
... shake the con- tents thoroughly . After a few minutes , filter off the solid matter ( what is it ? ) , repeating the filtration , if necessary , in order to obtain a perfectly clear filtrate . Evaporate about one third of the liquid ...
Σελίδα 30
... Shake the solution vigorously and notice that the ether quickly rises to the top of the tube when the tube is set aside . Now add 1 drop of a solution of potassium dichromate and again shake the mixture . Note the color of the layer of ...
... Shake the solution vigorously and notice that the ether quickly rises to the top of the tube when the tube is set aside . Now add 1 drop of a solution of potassium dichromate and again shake the mixture . Note the color of the layer of ...
Σελίδα 38
... Shake the contents of one tube and repeat the shaking after a few minutes but do not move the other tube . At the close of the laboratory period note the appearance of the liquid in each tube ( ? ) . b . Introduce about 0.2 g . of ...
... Shake the contents of one tube and repeat the shaking after a few minutes but do not move the other tube . At the close of the laboratory period note the appearance of the liquid in each tube ( ? ) . b . Introduce about 0.2 g . of ...
Σελίδα 39
... Shake the tubes gently and note the results . Repeat the experiment , substituting a small bit of lard or an oil for the sugar . How could you remove stains on cloth , due to ( 1 ) a sugar sirup ( molasses ) ; to ( 2 ) oils or grease ...
... Shake the tubes gently and note the results . Repeat the experiment , substituting a small bit of lard or an oil for the sugar . How could you remove stains on cloth , due to ( 1 ) a sugar sirup ( molasses ) ; to ( 2 ) oils or grease ...
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.