Lead Arsenate I Composition of Lead Arsenates Found On the Market Ii Home M
Lead Arsenate I Composition of Lead Arsenates Found On the Market Ii Home M
J K John Kerfoot Haywood
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All of . These can be easily obtained from druggists and are the cheapest compounds containing the necessary elements in a suitable form. The wholesale prices of the technical grades of these chemicals at the present time are: Lead acetate, 7J to 8 cents per pound; lead nitrate, 7f to 8| cents per pound; sodium arsenate, 5? to 6 cents per pound. These salts all show some variation in their composition and at times this may be very great, particularly in the case of sodium arsenate, which is the... salt used to supply the arsenic. Samples of these chemicals have been obtained in various parts of the country from druggists and other sources and subjected to analysis. In the lead salts the total amount of lead oxid has been determined and in the sodium arsenate total arsenic oxid and chlorin. These are the only substances which it is necessary to consider, as they are the ones that enter into the reaction. METHODS OF ANALYSIS. LEAD SALTS. Total lead oxid. This may be determined as sulphate by precipi- tating with sulphuric acid, or as oxid by precipitating with ammonia and ammonium carbonate and converting into the oxid by ignition.
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