Laboratory Manual: Arranged to Accompany the 2d Ed. of "A Course in General Chemistry"Ginn, 1921 - 280 σελίδες |
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Σελίδα 6
... tion the pointer starts to move . Arrest the beam and make a new adjustment of weights , repeating the operation until the desired equilibrium point is found . c . Add up the weights lying on the pan , and verify the count by the empty ...
... tion the pointer starts to move . Arrest the beam and make a new adjustment of weights , repeating the operation until the desired equilibrium point is found . c . Add up the weights lying on the pan , and verify the count by the empty ...
Σελίδα 8
... tion of the cork and cut through from the other end . Care must be taken to keep the borer at right angles to the cork . The hole should FIG . 12 be straight and smooth . The glass tube , rounded at the edges , is now inserted by a ...
... tion of the cork and cut through from the other end . Care must be taken to keep the borer at right angles to the cork . The hole should FIG . 12 be straight and smooth . The glass tube , rounded at the edges , is now inserted by a ...
Σελίδα 14
... tion of 5 g . of potassium permanganate in 25 cc . of water in D and add 3 cc . of sulfuric acid . Fill the funnel with com- mercial hydrogen peroxide and allow it to flow very slowly into the solution in D. 18. Properties and conduct ...
... tion of 5 g . of potassium permanganate in 25 cc . of water in D and add 3 cc . of sulfuric acid . Fill the funnel with com- mercial hydrogen peroxide and allow it to flow very slowly into the solution in D. 18. Properties and conduct ...
Σελίδα 24
... tion and add a few crystals of a highly colored salt ( potassium permanganate ) to the water in the distilling - flask . Continue the distillation of the water . Is the distillate colored ? Place 4 or 5 drops of the distilled water on a ...
... tion and add a few crystals of a highly colored salt ( potassium permanganate ) to the water in the distilling - flask . Continue the distillation of the water . Is the distillate colored ? Place 4 or 5 drops of the distilled water on a ...
Σελίδα 25
... tion to give a decided blue color . Half fill a test tube with the solution and set it aside . To the remainder add 5 cc . of a solution of alum and an equal volume of dilute ammonia . Note the formation of a white precipitate . Does it ...
... tion to give a decided blue color . Half fill a test tube with the solution and set it aside . To the remainder add 5 cc . of a solution of alum and an equal volume of dilute ammonia . Note the formation of a white precipitate . Does it ...
Άλλες εκδόσεις - Προβολή όλων
Laboratory Manual: Arranged to Accompany a Course in General Chemistry William Edwards Henderson Wi McPherson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2019 |
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.