Essentials of Volumetric Analysis An Introduction to the Subject Adapted to Th
Essentials of Volumetric Analysis An Introduction to the Subject Adapted to Th
Henry W Henry William Schimpf
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S. And titrate with tenth- normal silver nitrate V. S. To the production of a slight per- manent precipitate. Each mil of tenth-normal silver nitrate V. S. Used, corre- sponds to 0. 005404 gm. Of HCN. The slight precipitate which is produced in this assay and which marks the end reaction, is silver iodid (Agl). The precipitate of silver iodid does not appear until the cyanid has been entirely converted into the double salt (AgCN. KCN). Estimation of Potassium Cyanid (KCN = 65. 11). One gm. Of p...otassium cyanid is dissolved in sufficient distilled water to make 100 mils, then 65. 11 mils of this solution mixed with 5 mils of ammonia water and 3 drops of potassium iodid N solution are titrated with AgNOs V. S. Until the appearance of a permanent precipitate. Each mil indicates 2 per cent, i mil of AgNO 3 V. S. =0. 0130 gm. KCN. Estimation of Silver Salts Soluble silver salts may be estimated by direct titration with standard sodium chlorid, the process being exactly the converse of the precipitation methods for halogens.
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