Laboratory Manual: Arranged to Accompany "A Course in General Chemistry"Ginn, 1915 - 262 σελίδες |
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Σελίδα 3
... stopper should never be laid down on the desk. It should be caught between the fingers, as shown in Fig. 6. This leaves the hand free to grasp the bottle, as shown in Fig. 5. 4. Decantation. It is often necessary to separate a liquid ...
... stopper should never be laid down on the desk. It should be caught between the fingers, as shown in Fig. 6. This leaves the hand free to grasp the bottle, as shown in Fig. 5. 4. Decantation. It is often necessary to separate a liquid ...
Σελίδα 3
... stopper should never be laid down on the desk . It should be caught between the fingers , as shown in Fig . 6. This leaves the hand free to grasp the bottle , as shown in Fig . 5 . 4. Decantation . It is often necessary to separate a ...
... stopper should never be laid down on the desk . It should be caught between the fingers , as shown in Fig . 6. This leaves the hand free to grasp the bottle , as shown in Fig . 5 . 4. Decantation . It is often necessary to separate a ...
Σελίδα 15
... stopper and a delivery tube , as shown in Fig . 16. Finely powder about 2 g . of solid sodium hydrox- ide in a mortar and mix it with a little more than an equal weight of zinc dust . Place the mixture in the bottom of the test tube ...
... stopper and a delivery tube , as shown in Fig . 16. Finely powder about 2 g . of solid sodium hydrox- ide in a mortar and mix it with a little more than an equal weight of zinc dust . Place the mixture in the bottom of the test tube ...
Σελίδα 17
... stopper from the generator , add a few more fragments of zinc , and set the gen- erator aside until the gas ceases to be evolved . Sufficient zinc should be used so that at least a small portion of it remains undissolved./ Filter the ...
... stopper from the generator , add a few more fragments of zinc , and set the gen- erator aside until the gas ceases to be evolved . Sufficient zinc should be used so that at least a small portion of it remains undissolved./ Filter the ...
Σελίδα 20
... stopper carrying a glass tube B , about 8 cm . in length and not too small in bore . When tightly in- serted , the stopper should be about halfway in the flask , as shown in Fig . 22. Immerse the dry , empty flask in a beaker of water ...
... stopper carrying a glass tube B , about 8 cm . in length and not too small in bore . When tightly in- serted , the stopper should be about halfway in the flask , as shown in Fig . 22. Immerse the dry , empty flask in a beaker of water ...
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 barium beaker boiling bottle bromide Bunsen flame burner calcium charcoal compounds cool copper sulfate cork crucible crystals delivery tube dish Dissolve distilled drops equal volume evaporate evaporating-dish evolved ferric filter paper filtrate flask gentle heat gently glass rod glass tube hood hydrochloric acid hydrogen chloride hydrogen sulfide insert iodide iron laboratory limewater liquid liter litmus paper magnesium manganese dioxide mercuric metal mixture nitric acid nitrogen Note the color note the result obtained oxide oxygen portion potassium chlorate powdered precipitate form Prepare reaction reagents Repeat the experiment residue rubber tube screw clamp shake shown in Fig side shelf silver nitrate small piece sodium carbonate sodium hydroxide sodium sulfate solu soluble solution of ammonium solution of sodium stopper sulfuric acid temperature test tube tion volume of hydrogen watch glass weight wire zinc
Δημοφιλή αποσπάσματα
Σελίδα 80 - Prove the presence of carbon dioxide in the air exhaled from the lungs by blowing through limewater (R). Hold a wide-mouthed bottle above a small flame so that the hot gaseous products of combustion will collect in it ; then quickly add a few cubic centimeters of limewater, cover the mouth of the bottle with the hand, and shake up the contents. What do the results prove? What are the sources of carbon dioxide in the air ? Does the percentage in the air increase ? Why ? e.
Σελίδα 70 - ... 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 94 - Then add the precipitate together with about five times its weight of a mixture of equal parts of sodium carbonate and sulphur, and fuse over a Bunsen burner.
Σελίδα 60 - ... 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 83 - 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.
Σελίδα 95 - 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.