Laboratory Manual: Arranged to Accompany "A Course in General Chemistry"Ginn, 1915 - 262 σελίδες |
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Αποτελέσματα 1 - 5 από τα 26.
Σελίδα 1
... wire in various parts of the flame to gain an idea as to the relative temperatures . Pass a piece of glazed paper transversely through the flame , holding it steady for an instant across the flame . What information do you get from the ...
... wire in various parts of the flame to gain an idea as to the relative temperatures . Pass a piece of glazed paper transversely through the flame , holding it steady for an instant across the flame . What information do you get from the ...
Σελίδα 9
... wire in the Bunsen flame for a few seconds . Is the iron changed ? Exam- ine it when it has cooled . Have the properties changed ? Has a chemical action occurred ? b . Repeat a , using a splint of wood in place of the iron wire . How ...
... wire in the Bunsen flame for a few seconds . Is the iron changed ? Exam- ine it when it has cooled . Have the properties changed ? Has a chemical action occurred ? b . Repeat a , using a splint of wood in place of the iron wire . How ...
Σελίδα 14
... wire , 12 or 15 cm . long , with sulfur by wrapping a bit of cotton about the end of the wire and dipping this into melted sulfur . Ignite the sulfur by holding it in a Bunsen flame for an instant , then thrust the wire into a bottle of ...
... wire , 12 or 15 cm . long , with sulfur by wrapping a bit of cotton about the end of the wire and dipping this into melted sulfur . Ignite the sulfur by holding it in a Bunsen flame for an instant , then thrust the wire into a bottle of ...
Σελίδα 18
... wire , a bit of charcoal . FIG . 19 25. The oxyhydrogen blowpipe . If the instrument is avail- able , examine the structure of the oxyhydrogen blowpipe . Draw a diagram representing a cross section of it . Compare it with the ordinary ...
... wire , a bit of charcoal . FIG . 19 25. The oxyhydrogen blowpipe . If the instrument is avail- able , examine the structure of the oxyhydrogen blowpipe . Draw a diagram representing a cross section of it . Compare it with the ordinary ...
Σελίδα 36
... wire or file , and quickly invert over the crucible a large beaker or wide- mouthed bottle , being careful to keep the rim of the beaker below the surface of the water . The white fumes formed have the composition P2O . Leave the beaker ...
... wire or file , and quickly invert over the crucible a large beaker or wide- mouthed bottle , being careful to keep the rim of the beaker below the surface of the water . The white fumes formed have the composition P2O . Leave the beaker ...
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.