Platinum Silver Alloys ..
Platinum Silver Alloys ..
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(7) Encyclopedia Britt. Ninth Edit. 19; 201.
Digitized by VjOOQ IC lO JOHN FAIRFIELD THOMPSON, B.S.
sisted in dissolving the impure platinum in aqua regia and freeing from nitric acid by repeatied evaporations with hydrochloric acid.
This hydrochloric acid solution, containing both of the elements in their highest state of oxidation, was then taken to dryness and heated on an electric hot plate for several hours at a temperature of 125 degrees Centigrade. It was then taken up with hydrochloric ...acid and water and precipitated by the addition of ammonium chloride and alcohol. The iridium, which had been reduced by the heating to a lower chloride, not being precipitated by the ammonium chloride, passed into the filtrate along with some of the platinum, also reduced. The platiniun ammonium chloride was then dried and tested for purity by spreading it out on a glazed paper and examining portions selected from different parts thoroughly under a micro- scope (80 diameters). In no case, although eight separate portions were examined from each lot, could any salt be detected except the yellow crystals of platinum ammonium chloride.
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You can find similar books in the "Read Also" column, or choose other free books by Thompson, John Fairfield to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
(7) Encyclopedia Britt. Ninth Edit. 19; 201.
Digitized by VjOOQ IC lO JOHN FAIRFIELD THOMPSON, B.S.
sisted in dissolving the impure platinum in aqua regia and freeing from nitric acid by repeatied evaporations with hydrochloric acid.
This hydrochloric acid solution, containing both of the elements in their highest state of oxidation, was then taken to dryness and heated on an electric hot plate for several hours at a temperature of 125 degrees Centigrade. It was then taken up with hydrochloric ...acid and water and precipitated by the addition of ammonium chloride and alcohol. The iridium, which had been reduced by the heating to a lower chloride, not being precipitated by the ammonium chloride, passed into the filtrate along with some of the platinum, also reduced. The platiniun ammonium chloride was then dried and tested for purity by spreading it out on a glazed paper and examining portions selected from different parts thoroughly under a micro- scope (80 diameters). In no case, although eight separate portions were examined from each lot, could any salt be detected except the yellow crystals of platinum ammonium chloride.
What to read after Platinum Silver Alloys ..?
You can find similar books in the "Read Also" column, or choose other free books by Thompson, John Fairfield to read onlineMoreLess
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