A Foundation Course in Chemistry for Students of Agriculture And Technology
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In our eReader you can find the full English version of the book. Read A Foundation Course in Chemistry for Students of Agriculture And Technology Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Foundation Course in Chemistry for Students of Agriculture And Technology
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Most of the sulphates are soluble in water, the exceptions being those of lead, silver, and calcium, which are only slightly soluble, and those of strontium and barium. 2 When sulphates are heated with charcoal they are reduced to sulphides (p. 81).
When ferrous sulphate, FeSO 4 . 7H 2 O (p. 200), is strongly heated in the air it is oxidised and decomposed, and sulphur trioxide is evolved 2FeSO 4 +>*-> Fe 2 O 3 -f 2SO 3 The sulphur trioxide combines with the water, which is also given off to fo...rm an acid of approximately the composition 1 Care must be taken in diluting concentrated sulphuric acid with water ; it is always advisable to add the acid to the water.
2 BaSO 4 is almost completely insoluble in pure water.
SULPHUR H 2 S 2 O 7 . This acid is the original " Oil of Vitriol " ; it gives off sulphur trioxide as white fumes on being heated gently, and is therefore called fuming sulphuric acid. When more water is added it forms ordinary sulphuric acid. A salt of the acid can, however, be prepared by the action of heat upon the acid sulphates 2KHSO 4 -> K 2 S 2 O 7 + H 2 O Because they are produced by the action of heat, these salts are called pyrosulphates and the acid 1 pyrosulphuric acid (or disulphuric acid).
What to read after A Foundation Course in Chemistry for Students of Agriculture And Technology?
You can find similar books in the "Read Also" column, or choose other free books by J W Dodgson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Most of the sulphates are soluble in water, the exceptions being those of lead, silver, and calcium, which are only slightly soluble, and those of strontium and barium. 2 When sulphates are heated with charcoal they are reduced to sulphides (p. 81).
When ferrous sulphate, FeSO 4 . 7H 2 O (p. 200), is strongly heated in the air it is oxidised and decomposed, and sulphur trioxide is evolved 2FeSO 4 +>*-> Fe 2 O 3 -f 2SO 3 The sulphur trioxide combines with the water, which is also given off to fo...rm an acid of approximately the composition 1 Care must be taken in diluting concentrated sulphuric acid with water ; it is always advisable to add the acid to the water.
2 BaSO 4 is almost completely insoluble in pure water.
SULPHUR H 2 S 2 O 7 . This acid is the original " Oil of Vitriol " ; it gives off sulphur trioxide as white fumes on being heated gently, and is therefore called fuming sulphuric acid. When more water is added it forms ordinary sulphuric acid. A salt of the acid can, however, be prepared by the action of heat upon the acid sulphates 2KHSO 4 -> K 2 S 2 O 7 + H 2 O Because they are produced by the action of heat, these salts are called pyrosulphates and the acid 1 pyrosulphuric acid (or disulphuric acid).
What to read after A Foundation Course in Chemistry for Students of Agriculture And Technology?
You can find similar books in the "Read Also" column, or choose other free books by J W Dodgson to read onlineMoreLess
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