Laboratory Manual of General Chemistry With Exercises in the Preparation of Ino
Laboratory Manual of General Chemistry With Exercises in the Preparation of Ino
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When the first action is over, warm gently from time to time just enough to keep the action going (E 3 ). When no more red vapors come off' heat strongly for two or three minutes. To determine the completeness of the oxidation, test for arsenious acid by diluting a few drops of the solution with a few cubic centimeters of water in a test-tube, adding an excess of sodium bicar- bonate crystals (E 4 ), and then a few drops of an iodine solution. If the color of the iodine disappears, arsenious ac...id is present and the oxidation is not complete (E 5 ). In this case, add more nitric acid and continue the warming.
Finally evaporate the liquid just to dryness, rotating the casserole all the while until the residue is dry. Avoid heating the residue too strongly. Allow the casserole to cool, and then add 65 c. Cm. Of water. Dissolve the residue com- pletely by warming and stirring. Transfer the liquid to a smaller casserole, and evaporate until a thermometer dipped in it shows a temperature of 115.
What to read after Laboratory Manual of General Chemistry With Exercises in the Preparation of Ino?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Becket Lamb to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
When the first action is over, warm gently from time to time just enough to keep the action going (E 3 ). When no more red vapors come off' heat strongly for two or three minutes. To determine the completeness of the oxidation, test for arsenious acid by diluting a few drops of the solution with a few cubic centimeters of water in a test-tube, adding an excess of sodium bicar- bonate crystals (E 4 ), and then a few drops of an iodine solution. If the color of the iodine disappears, arsenious ac...id is present and the oxidation is not complete (E 5 ). In this case, add more nitric acid and continue the warming.
Finally evaporate the liquid just to dryness, rotating the casserole all the while until the residue is dry. Avoid heating the residue too strongly. Allow the casserole to cool, and then add 65 c. Cm. Of water. Dissolve the residue com- pletely by warming and stirring. Transfer the liquid to a smaller casserole, and evaporate until a thermometer dipped in it shows a temperature of 115.
What to read after Laboratory Manual of General Chemistry With Exercises in the Preparation of Ino?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Becket Lamb to read onlineMoreLess
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