A Laboratory Outline of General Chemistry
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What other materials might be substituted for potassium iodide in preparing iodine?
Note 34. Stains upon the fingers caused by iodine may be removed by rubbing with sodium thiosulphate solution ("hypo").
47. Properties of Iodine. Shake a few crystals of iodine vigorously [Note 34] with about 10 c. C. Of water in a test-tube. Pour the clear liquid off, dividing it equally between four test-tubes.
a. Add to one portion a few drops of chloroform, to another ether, and to a third carbon disulphide.... Shake each vigor- ously and note the relative solubility (estimated by depth of color) of iodine in water as compared with that in each of the other solvents (?).
44 BROMINE, IODINE, FLUORINE [ 48 b. Take 15 c. C. Of starch emulsion and add the fourth portion to it (?). Pour the mixture info the graduated cylinder and add water so long as a sample poured out into a test-tube continues to show an easily perceptible color. Why is the use of starch considered to be a delicate test for iodine? Does it show the presence of iodine in combination (48 6) ?
What to read after A Laboratory Outline of General Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Smith Alexander to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
What other materials might be substituted for potassium iodide in preparing iodine?
Note 34. Stains upon the fingers caused by iodine may be removed by rubbing with sodium thiosulphate solution ("hypo").
47. Properties of Iodine. Shake a few crystals of iodine vigorously [Note 34] with about 10 c. C. Of water in a test-tube. Pour the clear liquid off, dividing it equally between four test-tubes.
a. Add to one portion a few drops of chloroform, to another ether, and to a third carbon disulphide.... Shake each vigor- ously and note the relative solubility (estimated by depth of color) of iodine in water as compared with that in each of the other solvents (?).
44 BROMINE, IODINE, FLUORINE [ 48 b. Take 15 c. C. Of starch emulsion and add the fourth portion to it (?). Pour the mixture info the graduated cylinder and add water so long as a sample poured out into a test-tube continues to show an easily perceptible color. Why is the use of starch considered to be a delicate test for iodine? Does it show the presence of iodine in combination (48 6) ?
What to read after A Laboratory Outline of General Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Smith Alexander to read onlineMoreLess
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