Excerpt from Laboratory Manual of Agricultural Chemistry Dissolve 20 g. Of commercial kzcrzo7 in 75 cc. Of warm water, cool, and pour slowly into it, with constant stirring, 115 cc. Of commercial sulphuric acid (h2804). The potas sium dichromate solution should be placed in a No. 7 evap orating dish, if convenient, before pouring the sulphuric acid into it. When the solution is completely cooled, it should be transferred to a 250 cc. Wide-mouthed bottle. (be careful in making this mixture, so as not to spill it on your ...
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Excerpt from Laboratory Manual of Agricultural Chemistry Dissolve 20 g. Of commercial kzcrzo7 in 75 cc. Of warm water, cool, and pour slowly into it, with constant stirring, 115 cc. Of commercial sulphuric acid (h2804). The potas sium dichromate solution should be placed in a No. 7 evap orating dish, if convenient, before pouring the sulphuric acid into it. When the solution is completely cooled, it should be transferred to a 250 cc. Wide-mouthed bottle. (be careful in making this mixture, so as not to spill it on your clothes.) Invert the burettes in the cleaning mix ture, attach the rubber tubing, draw up to the 50 cc. Mark, and allow to stand for at least half an hour before being used. (see that the burette stopcocks work smoothly and are not clogged with grease.) Coat the burette stopcocks with a very small amount of vaseline to prevent sticking. The cleaning mixture is to be used throughout the course. Avoid the addition of water to the cleaning mixture. A burette is clean when the drops of water will not adhere to the sides. Other useful cleaning mixtures are soap solutions, alcoholic koh solutions, and ammoniacal alcohol solutions. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.