Laboratory Methods of Inorganic Chemistry
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1 Acidify the sample with sulphuric acid, whereupon the precipitate, which is mainly ferric hydroxide, dissolves; decolorize the hot solution with a measured excess of 0. 1-normal oxalic acid * and titrate back at 60 with 0. 1-normal permanganate. The per- manganate solution obtained in this manner is so dilute that it does not pay to attempt to crystallize the solid salt. The current yield in several experiments made in the author's laboratory with 1. 5-3. 0 amperes was as high as 25% at the e...nd of 45 minutes; in the next hour it sank to about 10%.
85. Barium Ferrate, Ba[FeOj.
Clamp a 50-75 c. C. Flask in an upright position and place in it a mixture of 10 g. Of fine iron filings and 20 g. Of potassium nitrate. Heat with a flame until a reaction takes place and the iron burns with a shower of sparks. After cooling break the flask, extract four times with 50 c. C. Of ice water, and filter the combined extract through asbestos. Pass the deep violet-red filtrate again through a fresh asbestos felt and precipitate it immediately with a solution of barium chloride.
What to read after Laboratory Methods of Inorganic Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Heinrich Biltz to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
1 Acidify the sample with sulphuric acid, whereupon the precipitate, which is mainly ferric hydroxide, dissolves; decolorize the hot solution with a measured excess of 0. 1-normal oxalic acid * and titrate back at 60 with 0. 1-normal permanganate. The per- manganate solution obtained in this manner is so dilute that it does not pay to attempt to crystallize the solid salt. The current yield in several experiments made in the author's laboratory with 1. 5-3. 0 amperes was as high as 25% at the e...nd of 45 minutes; in the next hour it sank to about 10%.
85. Barium Ferrate, Ba[FeOj.
Clamp a 50-75 c. C. Flask in an upright position and place in it a mixture of 10 g. Of fine iron filings and 20 g. Of potassium nitrate. Heat with a flame until a reaction takes place and the iron burns with a shower of sparks. After cooling break the flask, extract four times with 50 c. C. Of ice water, and filter the combined extract through asbestos. Pass the deep violet-red filtrate again through a fresh asbestos felt and precipitate it immediately with a solution of barium chloride.
What to read after Laboratory Methods of Inorganic Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Heinrich Biltz to read onlineMoreLess
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