Elementary Household Chemistry: An Introductory Textbook for Students of Home EconomicsMacmillan, 1914 - 307 σελίδες |
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Σελίδα 5
... minute . Then look through the film towards the light . The test is obtained more promptly if the test tube has been loosely covered for a few minutes . FIG . 8. - A test tube . The chemical change illustrated in this experiment occurs ...
... minute . Then look through the film towards the light . The test is obtained more promptly if the test tube has been loosely covered for a few minutes . FIG . 8. - A test tube . The chemical change illustrated in this experiment occurs ...
Σελίδα 6
... minute particles of a substance ( silver chloride ) which does not dissolve in water . These particles are in the solid state . To verify this close the test tube with the thumb and shake vigorously , so as to combine the particles into ...
... minute particles of a substance ( silver chloride ) which does not dissolve in water . These particles are in the solid state . To verify this close the test tube with the thumb and shake vigorously , so as to combine the particles into ...
Σελίδα 8
... minute droplets of water . Close the beaker with a watch glass , invert it , pour in a little limewater and shake . What gas was present in the beaker ? ( See Expt . 5. ) Repeat this experiment , using an unlighted burner with the gas ...
... minute droplets of water . Close the beaker with a watch glass , invert it , pour in a little limewater and shake . What gas was present in the beaker ? ( See Expt . 5. ) Repeat this experiment , using an unlighted burner with the gas ...
Σελίδα 13
... minutes with the mixture of sulphuric acid and water . eeeeee FIG . 18. - Hofmann's apparatus for the elec- trolysis of water . If the hydrogen and oxygen produced in the electrolysis of water are both collected and mixed and set on ...
... minutes with the mixture of sulphuric acid and water . eeeeee FIG . 18. - Hofmann's apparatus for the elec- trolysis of water . If the hydrogen and oxygen produced in the electrolysis of water are both collected and mixed and set on ...
Σελίδα 14
... minutes . Allow to cool and examine the residue . Add to it as much warm water as it will absorb and allow it to stand a few minutes . Add more water to the product and test the water with litmus paper . The material of which marble ...
... minutes . Allow to cool and examine the residue . Add to it as much warm water as it will absorb and allow it to stand a few minutes . Add more water to the product and test the water with litmus paper . The material of which marble ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
100-Calorie portion acetic acid action alcohol alkali aluminium ammonia ammonium Apparatus atoms bases beaker bisulphite bleaching boiling burning calcium Calories carbohydrates carbon dioxide carbon monoxide cellulose cent per cent CHAPTER chemical change chemistry coal color combustion compounds constituents contain copper cotton crystals dilute dish dissolved dyes elements esters ethyl Experiment Expt ferric fibers filter flame formula fuel value gases glass glucose glycerol grams H₂O hydrochloric acid hydrogen hydrolysis inch insoluble iron limewater liquid liter litmus paper magnesium Materials metal mixture molecules nitrate nitrogen odor ounces oxide oxygen phosphorus piece potassium potassium hydroxide pound powder precipitate Protein Fat Carbo proteins radicle reaction reagent residue salts silk soap soda sodium bisulphite sodium carbonate sodium chloride sodium hydroxide solid soluble starch substances sugar sulphate sulphuric acid temperature test tube tion vegetable washing weight wood wool yield zinc
Δημοφιλή αποσπάσματα
Σελίδα 191 - In the dietary studies made in connection with the nutrition investigations of the Office of Experiment Stations of the United States Department of Agriculture...
Σελίδα 294 - 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 295 - 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 26 - Kelvin has shown that if a drop of water were magnified to the size of the earth the molecules of water would be of a size intermediate between that of a cricket ball and of a marble.