III.—On the Reduction of Ferric Iron (1) by Sulphurous Acid and (2) by Zinc Dust
1913 ◽
Vol 32
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pp. 12-16
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So many papers have appeared on this subject that some apology seems desirable before making an additional contribution. The amount of published work on reduction with sulphurous acid is in itself an indication that many workers have found difficulties. It has been shown that the reduction does not take place in presence of large excess of hydrochloric or sulphuric acid, but the reduction will still occur while the reaction of the solution is strongly acid. On the other hand, Hillebrand (“Analysis of Silicate and Carbonate Rocks,” U.S. Bulletin, 442, p. 113) states if the solution after addition of sulphite is red in colour, it is too alkaline and acid must be added.
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1914 ◽
Vol 90
(615)
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pp. 26-32
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2019 ◽
Vol 10
(1)
◽
pp. 70
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1856 ◽
Vol 7
◽
pp. 11-15
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Keyword(s):
1853 ◽
Vol 143
◽
pp. 67-107
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1999 ◽
Vol 173
◽
pp. 249-254
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1969 ◽
Vol 27
◽
pp. 6-7
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1980 ◽
Vol 38
◽
pp. 30-33