The Atomic Weight of Vanadium
The Atomic Weight of Vanadium
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Of V 2 O 6 remained. The corrected weights were: Wt. Of Na V O, 0. 8843 " " Na Cl 0. 4241 Assuming the atomic weights of sodium and chlorine to be 23. 00 and 35. 46, respectively, this would give 50. 90 for the atomic weight of vanadium.
19 To see if it would be possible to remove all the van- adium by means of HC1 gas and chlorine, a still smaller weight of sodium vanadate was used; yet after several hours' heating, the residue still showed a yellow color and the aniline test showed 0. 003 gm.... V 2 O 5 . The corrected weights were: Na VOs 0. 4538 Na Cl 0. 2175 This would give 50. 97 for the atomic weight.
No importance is attached to these values, for the quantities used were too small.
The aniline test was worked out by Witz and Osmond (Bull. Soc. Chim. (2) 45, 309), and is of value in estimating very small quantities of vanadium. It depends on the fact that vanadium salts are easily oxidized and reduced, and therefore can act as oxygen carriers.
If a solution of potassium chlorate is added to a solu- tion of aniline hydro-chloride, heated to boiling and allowed to stand at room temperature, no coloration appears.
What to read after The Atomic Weight of Vanadium?
You can find similar books in the "Read Also" column, or choose other free books by D J Dunlap Jamison Mcadam to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Of V 2 O 6 remained. The corrected weights were: Wt. Of Na V O, 0. 8843 " " Na Cl 0. 4241 Assuming the atomic weights of sodium and chlorine to be 23. 00 and 35. 46, respectively, this would give 50. 90 for the atomic weight of vanadium.
19 To see if it would be possible to remove all the van- adium by means of HC1 gas and chlorine, a still smaller weight of sodium vanadate was used; yet after several hours' heating, the residue still showed a yellow color and the aniline test showed 0. 003 gm.... V 2 O 5 . The corrected weights were: Na VOs 0. 4538 Na Cl 0. 2175 This would give 50. 97 for the atomic weight.
No importance is attached to these values, for the quantities used were too small.
The aniline test was worked out by Witz and Osmond (Bull. Soc. Chim. (2) 45, 309), and is of value in estimating very small quantities of vanadium. It depends on the fact that vanadium salts are easily oxidized and reduced, and therefore can act as oxygen carriers.
If a solution of potassium chlorate is added to a solu- tion of aniline hydro-chloride, heated to boiling and allowed to stand at room temperature, no coloration appears.
What to read after The Atomic Weight of Vanadium?
You can find similar books in the "Read Also" column, or choose other free books by D J Dunlap Jamison Mcadam to read onlineMoreLess
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