Laboratory Manual: Arranged to Accompany the 2d Ed. of "A Course in General Chemistry"Ginn, 1921 - 280 σελίδες |
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Σελίδα 16
... sulfate . What change do you notice ? Now add to each about 1 cc . of hydrochloric acid . Which evolves hydrogen the more rapidly ? What is the function of the copper sulfate ( § 14 ) ? 23. Usual laboratory method . Arrange a hydrogen ...
... sulfate . What change do you notice ? Now add to each about 1 cc . of hydrochloric acid . Which evolves hydrogen the more rapidly ? What is the function of the copper sulfate ( § 14 ) ? 23. Usual laboratory method . Arrange a hydrogen ...
Σελίδα 17
... sulfate . Pour just enough water through the funnel tube to cover the zinc . Prove that the apparatus is air - tight by blowing into the delivery tube until the water is forced nearly to the top of the funnel tube ; then quickly close ...
... sulfate . Pour just enough water through the funnel tube to cover the zinc . Prove that the apparatus is air - tight by blowing into the delivery tube until the water is forced nearly to the top of the funnel tube ; then quickly close ...
Σελίδα 18
... sulfate , cover the zinc with water , and add dilute sulfuric acid as in § 23 . After all the air has been expelled ( prove this by slipping a piece of rubber tubing over the tube C and testing samples of the gas collected over water ) ...
... sulfate , cover the zinc with water , and add dilute sulfuric acid as in § 23 . After all the air has been expelled ( prove this by slipping a piece of rubber tubing over the tube C and testing samples of the gas collected over water ) ...
Σελίδα 26
... sulfate in a dry test tube . What evidence have you of the presence of water in the crystals ? Examine the residue . How does it differ from the original crystals in appearance and in composition ? b . Select some small crystals of ...
... sulfate in a dry test tube . What evidence have you of the presence of water in the crystals ? Examine the residue . How does it differ from the original crystals in appearance and in composition ? b . Select some small crystals of ...
Σελίδα 27
... sulfate . When the crucible is cool , reweigh . From your results cal- culate the percentage of water of hydration in the crystals . Compare your results with those of other students who have used different weights of crystals . 38 ...
... sulfate . When the crucible is cool , reweigh . From your results cal- culate the percentage of water of hydration in the crystals . Compare your results with those of other students who have used different weights of crystals . 38 ...
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.