The Iron Ores of Great Britain
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Of solution were treated in exactly the same manner as the above. Weight of pyrophosphate of magnesia 0'24 gr. , equivalent to 0*80 per cent, of phosphoric acid. It must be remembered that this determination being made on about 20 grs. Of solution, the error, in calculating to 100, becomes magnified 5 times.
In a mineral consisting in great part of phosphoric acid, the considerable quan- tity of iron required to precipitate this as perphosphate, might ultimately be sufficient to retain a little... of the ammonio-phosphate of magnesia in solution ; but as the iron ores contain only a comparatively small amount of phosphoric acid' there is no fear of any appreciable error on this account.
Separation of phosphoric acid from alumina. To test the accuracy of Fuchs' method of separating phosphoric acid from alumina by silicate of potash, the fol- lowing experiment was made : 5*31 grs. Of phosphate of baryta, from the same sample as that alluded to at page 52, was dissolved in hydrochloric acid ; sulphuric acid was added to the solution, which was then filtered.
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You can find similar books in the "Read Also" column, or choose other free books by Geological Survey of Great Britain to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Of solution were treated in exactly the same manner as the above. Weight of pyrophosphate of magnesia 0'24 gr. , equivalent to 0*80 per cent, of phosphoric acid. It must be remembered that this determination being made on about 20 grs. Of solution, the error, in calculating to 100, becomes magnified 5 times.
In a mineral consisting in great part of phosphoric acid, the considerable quan- tity of iron required to precipitate this as perphosphate, might ultimately be sufficient to retain a little... of the ammonio-phosphate of magnesia in solution ; but as the iron ores contain only a comparatively small amount of phosphoric acid' there is no fear of any appreciable error on this account.
Separation of phosphoric acid from alumina. To test the accuracy of Fuchs' method of separating phosphoric acid from alumina by silicate of potash, the fol- lowing experiment was made : 5*31 grs. Of phosphate of baryta, from the same sample as that alluded to at page 52, was dissolved in hydrochloric acid ; sulphuric acid was added to the solution, which was then filtered.
What to read after The Iron Ores of Great Britain?
You can find similar books in the "Read Also" column, or choose other free books by Geological Survey of Great Britain to read onlineMoreLess
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