This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ... CHAPTER XVI SYSTEMATIC ANALYSIS OF AN UNKNOWN Detection of the Bases A--The prepared solution or solutions from Chapter ...Read MoreThis historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ... CHAPTER XVI SYSTEMATIC ANALYSIS OF AN UNKNOWN Detection of the Bases A--The prepared solution or solutions from Chapter XIII are used for the systematic analysis. Group I To the acid solution add a few drops of HCl to test for the presence of the members of this group. If a precipitate forms it may be AgCl, HgCl, PbCl2, Bi0Cl, or Sb0Cl. Add HCl.to complete precipitation. Filter. To a portion of the precipitate or the original solution add HCl in excess and warm. If the precipitate entirely redissolves, without reprecipitating on cooling, it is probably bismuth or antimony. If the precipitate entirely dissolves with a moderate excess of the dilute acid in the above test, treat the entire precipitate with an excess of HCl and proceed as though no precipitate had been obtained with the precipitation of the second group. If the precipitate does not completely redissolve, filter and add to filtrate considerable water to test for the presence of antimony or bismuth. Should a test be obtained, treat the whole group precipitate with sufficient HCl to redissolve the antimony and bismuth but avoid a large excess of HCl, warm, filter, and add this filtrate to the original filtrate. Save the combined filtrates for Group II. Wash the precipitate or residue twice and analyze according to B. A--Solution may contain had, silver and mercurous mercury. HCl PbCl2, AgCl, HgCl. B--Treat with hot water v B--Treat the group precipitate with hot water. Filter while hot. The PbC dissolves and lead is tested for according to D. The chlorides of silver and mercury remain. Pour about 5 cc. of strong NH40H repeatedly through the filter containing the residue. If a black residue, Hg and HgNH2Cl, is obtained, the presence of mercurous mercury is proved. C--The...Read Less
New. 215 pages. Reprinted from 1916 edition. New 2013 edition in PAPERBACK is SEWN PERFECT BOUND, much more durable than a standard paperback. This is a quality reprint of an old book of historical value. If the original book was printed in multiple volumes than this reprint is of only a single volume. This is an exact/strict reproduction of text, no changes has been made in respect to the original text. A lot of effort has been made to check and improve each page/scan manually for its quality of text and illustrations (if any, are in b/w). Folded illustrations, if any, are not included in the book. This is not a retyped or an ocr'd book. Index, contents, etc, if any in the original book, are included. This item is printed on demand using good quality natural shade paper. The title of the book, on the cover, is in gold lettering.
New. 225 pages. ReInk Books reprint from the 1916 edition. This paperback book is SEWN perfect bound, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of paperback binding. It can also be open wide. The pages will not fall out and will be around for a lot longer than normal paperbacks. NO changes have been made to the original text. Each page is checked manually before printing. Illustrations, Index, if any, are included in b/w. Fold-outs, if any, are not part of the book. If the original book was printed in multiple volumes than this reprint is of only a single volume. This book is printed on demand on acid-free paper. (Original publisher: John Wiley & sons, inc.; [etc., etc. ])
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