Laboratory Manual: Arranged to Accompany the 2d Ed. of "A Course in General Chemistry"Ginn, 1921 - 280 σελίδες |
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Σελίδα
... remains little oppor- tunity for originality or invention . His problem is rather one of selection . Accordingly this laboratory manual lays no claim to originality , either in method or in content . It has been slowly developed in ...
... remains little oppor- tunity for originality or invention . His problem is rather one of selection . Accordingly this laboratory manual lays no claim to originality , either in method or in content . It has been slowly developed in ...
Σελίδα 9
... remain unchanged ? What grounds do you have for assuming that a chemical action has taken place ? d . Place about 1g . of common salt in a test tube and dissolve it in a little water . Pour the clear solution into an evaporating - dish ...
... remain unchanged ? What grounds do you have for assuming that a chemical action has taken place ? d . Place about 1g . of common salt in a test tube and dissolve it in a little water . Pour the clear solution into an evaporating - dish ...
Σελίδα 11
... remain in the bottle ? Now fill the bottle with exhaled air by placing one end of a piece of glass or rubber tubing under the mouth of the bottle and blowing gently through the other end . The bubbles will rise and fill the bottle ...
... remain in the bottle ? Now fill the bottle with exhaled air by placing one end of a piece of glass or rubber tubing under the mouth of the bottle and blowing gently through the other end . The bubbles will rise and fill the bottle ...
Σελίδα 12
... remains in the tube ? How has the heat affected the mercuric oxide ? b . In a similar way try heating other oxides such as iron oxide , manganese dioxide , lead peroxide , barium dioxide , and copper oxide . Do all of these yield oxygen ...
... remains in the tube ? How has the heat affected the mercuric oxide ? b . In a similar way try heating other oxides such as iron oxide , manganese dioxide , lead peroxide , barium dioxide , and copper oxide . Do all of these yield oxygen ...
Σελίδα 17
... remains undissolved . Filter the liquid from the undissolved zinc into an evaporating - dish and evaporate it to dryness . What is left in the dish ? After the dish is cool , dissolve the residue in as little hot water as possible and ...
... remains undissolved . Filter the liquid from the undissolved zinc into an evaporating - dish and evaporate it to dryness . What is left in the dish ? After the dish is cool , dissolve the residue in as little hot water as possible and ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acetate add a little aluminium ammonia ammonium hydroxide ammonium sulfide antimony Arrange an apparatus barium beaker boiling bottle bromide Bunsen flame burner calcium carbon dioxide charcoal chloric acid compounds concentrated sulfuric acid cool copper sulfate cork crucible crystals delivery tube dilute solution dish Dissolve distillate drops evaporate evaporating-dish ferric filter paper filtrate flask gentle heat glass rod glass tube hood hydro hydrochloric acid hydrogen chloride hydrogen sulfide insert iodide iron laboratory limewater liquid liter litmus paper magnesium mercuric metal mixture nitric acid Note the color Note the results obtained oxygen peroxide portion potassium chlorate powdered precipitate form Prepare reaction reagents Repeat the experiment residue rubber tubing screw clamp shake shown in Fig silver nitrate small piece sodium carbonate sodium hydroxide sodium sulfate solu soluble solution of hydrogen solution of sodium stopper sulfuric acid temperature test tube tion watch glass weight wire zinc
Δημοφιλή αποσπάσματα
Σελίδα 35 - 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 52 - ... having drank a Flask of Florence at a Tavern, and thrown the empty Flask upon the Fire, he call'd for a Bason of Water to wash his Hands, and perceiving that the little Wine left in the Flask had filled up the Flask with Steam, he took the Flask by the Neck and plunged the Mouth of it under the Surface of the Water in the Bason, and the Water of the Bason was immediately driven up into the Flask by the Pressure of the Air.
Σελίδα 106 - ... in a solution of sodium hypochlorite. Note the results. Cut the tube containing the deposit so as just to remove the jet, and, inclining it, 0 FIG. 49 apply a gentle heat, as in b. Account for the results and write the equations for all the reactions involved in the experiment. 150. Arsenious oxide. Place a very little arsenious oxide in a test tube and add a few cubic centimeters of a solution of sodium hydroxide, heating the solution gently. Does the oxide dissolve (R) ? What do you infer as...
Σελίδα 71 - ... powdered brimstone in a test tube. Cover the mouth of the tube with the thumb and shake the contents gently until the sulfur is dissolved, adding more carbon disulfide if necessary. Pour the clear solution into a small beaker, cover it loosely with a filter paper, and set it aside in the hood.
Σελίδα 95 - ... of water. What action takes place ? Test the reaction of the water with litmus paper. Holding the test tube in an inverted position (why?), remove it from the water and quickly ignite the gas at the mouth of the tube. How does the flame compare with that of burning ethylene and burning methane ? 6. Collect another test tube full of the gas, quickly pour into it about 1 cc. of bromine water, close the mouth of the tube with the thumb, and shake it vigorously. Is the bromine absorbed by the acetylene...
Σελίδα 103 - 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.