| 单词 | potassium dichromate |
| 例句 | The contamination was first detected more than a decade ago, and officials traced it to potassium dichromate used to prevent corrosion inside cooling towers at Los Alamos lab's power plant. Federal and state regulators have set their focus on cleaning up a plume of chromium contamination near the border of the San Ildefonso Pueblo, a New Mexico tribal community 2016-04-04T04:00:00Z Vowing revenge, Bond, a laboratory technician, stole the chemical 10-chloro-10H phenoxarsine from the company where she worked and purchased potassium dichromate on Amazon.com. Justices: Treaty can't be invoked in assault case 2014-06-02T04:00:00Z The principle of the process is this: An organic tacky substance is sensitized with potassium dichromate, and exposed under a reversed positive to the action of light. Photogravure 2011-06-19T02:00:24.663Z The latter is prepared by oxidizing the anthracene—previously reduced by sublimation to the condition of a very finely-divided crystalline powder—with sulphuric acid and potassium dichromate. Coal and What We Get from It It will be noticed that the oxidizing action of potassium dichromate leaves potassium sulphate and chromium sulphate as the products of the reaction. An Elementary Study of Chemistry On boiling it with copperas it becomes violet, while on boiling with potassium dichromate it changes to a yellowish brown. Scientific American Supplement, No. 363, December 16, 1882 It consists of a Bunsen battery that I activate not with potassium dichromate but with sodium. Twenty Thousand Leagues Under the Sea This is performed in a solution of potassium dichromate rendered alkaline with ammonia. Photogravure 2011-06-19T02:00:24.663Z On evaporating the solution these substances crystallize out as potassium chrome alum, which substance is produced as a by-product in the industries using potassium dichromate for oxidizing purposes. An Elementary Study of Chemistry |
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