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. 1904 Excerpt: ...and SO2. Wet Tests.--Diss.-5 gm. tartaric acid in 5 c.c. aq. KCl, stir and let stand for some time: crystalline ppt. of KHC4H4O6 with an acid tartrate or free tartaric acid, but boric acid prevents the precipitation; insol. in acetic acid, readily sol. in HCl, HNO3, H2SO4, alkalis and alk. carbonates. CaO2H2 (in excess ...
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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. 1904 Excerpt: ...and SO2. Wet Tests.--Diss.-5 gm. tartaric acid in 5 c.c. aq. KCl, stir and let stand for some time: crystalline ppt. of KHC4H4O6 with an acid tartrate or free tartaric acid, but boric acid prevents the precipitation; insol. in acetic acid, readily sol. in HCl, HNO3, H2SO4, alkalis and alk. carbonates. CaO2H2 (in excess) with free tartaric acid: white ppt. of Ca tartrate, sol. in NaOH and acetic acid. For Neutral Tartrates.--Diss. $ gm. NH4KC4H4O6 in 5 c.c. aq. CaCl2, with neutral sols, of tartrates: white ppt. of CaC4H4O6, stir and let stand; sol. in free tartaric acid. AgNO3: white curdy ppt. of Ag2C4H4O6, sol. in excess of the tartrate, in NH4OH and in HNO3. Partially dissolve some of the Ag2C4H4O6 ppt. in dil. NH4OH, add a fragment of AgNO., immerse the test tube in a beaker of warm water (about SUCCINIC ACID AND MAIJC ACID 49 60 C) for 10 to 20 minutes; the Ag is reduced and forms a mirror on the test tube. A little free NaOH is said to hasten the formation of the mirror. N.B.--Clean the test tube before using with NaOH and distilled aq. TO DISTINGUISH BETWEEN CITRIC AND TARTARIC ACIDS. Resorcin and about 2 c.c. conc. H2SO4 added to a very small quantity of a solid tartrate or tartaric acid, and carefully warmed: bright red colour. Pyrogallol, instead of resorcin: purple. FeSO.f, a few drops of H2O2 and an excess of NaOH: blue to purple colour. Citric acid does not give the above colour reactions. Succinic Acid, C2H4(COOH)2. Crystallized; readily sol. in water, alcohol, and ether, insol. in chloroform. Benzoic acid is soluble. Dry TESTS.--When heated in a tube it yields water and the anhydride sublimes, emits irritating vapours and causes coughing. Solid succinates when warmed with KHSO4 yield succinic acid in oily drops, which crystallize on cooling, ...
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Add this copy of Tables for Qualitative Chemical Analysis, Arranged for to cart. $54.95, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2015 by Palala Press.
