This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 Excerpt: ... NatO. 5. Sodium Sulphite.--Dissolves grams of the soda ash in about 50 cubic centimeters of water, acidify with acetic acid, and titrate with Tr normal iodine solution. Each cubic centimeter of iodine solution equals.126 per cent. of sodium sulphite. 29. Crystal Soda.--This substance is analyzed in the same manner as ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 Excerpt: ... NatO. 5. Sodium Sulphite.--Dissolves grams of the soda ash in about 50 cubic centimeters of water, acidify with acetic acid, and titrate with Tr normal iodine solution. Each cubic centimeter of iodine solution equals.126 per cent. of sodium sulphite. 29. Crystal Soda.--This substance is analyzed in the same manner as the above, except that on account of the large amount of water of crystallization, about double the amount must be taken for analysis. CHANCK-CLAU8 8ULPHUK KECOVKUY 30. Available Sulphur In Tank Waste.--In this determination the sulphide sulphur is set free by hydrochloric acid, collected in sodium-hydrate solution, and after acidifying, titrated with iodine solution. The details of the process are as follows; Weigh out in a 500-cubic-centimeter flask 2 grams of the tank waste, insert a two-holed rubber stopper through one hole of which is passed a funnel tube with a stop-cock, and through the other a tube bent to connect by means of a tight rubber tube, a suitable absorption apparatus. The apparatus described for the determination of sulphur in iron by evolution, in Quantitative Analysis, is suitable for this purpose. Two of the absorption tubes should be partially filled with sodium-hydrate solution and connected to the evolution flask. Slowly run hydrochloric acid (1 part of acid to 1 part of water) through the funnel tube on to the waste until the decomposition is completed. Boil the flask, to drive out all the hydrogen sulphide, and when the first absorption tube has become warm on account of the steam condensed in it, open the stop-cock of the funnel tube and allow the apparatus to cool. Empty the absorption tubes into a 500-cubic-centimeter measuring flask, fill to the mark with well-boiled water, and take 50 cubic centimeters for titra...
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