中文名称:Potassium dichromate(VI) 英文名称:Potassium dichromate(VI) CAS号:7778-50-9 分子式:Cr2K2O7 分子量:0 EINECS号: Mol文件:7778-50-9.mol Potassium dichromate(VI) 性质 熔点 398 °C 沸点 500°C 密度 2.676 形态 固体 颜色 橙色结晶 气味(Odor) 无味 酸碱指示剂变色ph值范围 4.04 (1% aq....
英語名:Potassium dichromate(VI)CBNumberCB91100966MFCr2K2O7MW0MOL File7778-50-9.molPotassium dichromate(VI)物理性質 融点 398 °C 沸点 500°C 比重(密度) 2.676 外見 個体 色 オレンジ色の結晶 臭い(Odor) 無臭 酸塩基指示薬変色域(pH) 4.04 (1% aq. solution) 水溶解度 20℃で6.5%...
49 Ionic equation below represent the reaction between acidified potassium dichromate (VI) solution and iron (II) sulphate solution.Persamaan ion dibawah mewakili tindakbalas antara larutan kalium dikromat(VI) dengan larutan ferum(II) sulfat Cr_2O_7^(2-)+14H^++6Fe^(2+) →6Fe^(3+)+2Cr...
题目 26 Which alcohol will react with an acidified solution of potassium dichromate(VI) to produce a ketone containing six carbon atoms? B A 2,2-dimethylbutan-1-ol B 2-methylpentan-3-ol C 3,3-dimethylpentan-2-ol D 3-methylpentan-3-ol 相关知识点: 试题来源: 解析 B 反馈 收藏 ...
If paper impregnated with potassium dichromate solution turns green, sulfur dioxide may be present (it reduces chromium(VI) to chromium(III)). Of course, this is a rather unsatisfactory test because any sufficiently powerful reducing agent will bring about the same reaction...
(chromium(VI)) to green (chromium(III)) via the initially formed but unstable Cr(IV) is used, usually with a spectrophotometric endpoint. The ethanolic solution is refluxed with excess acidified (H2SO4)potassiumdichromateuntil no further reaction occurs and the chromium(III) assayed as indicated...
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The diffusion coefficients of 0.1 M aqueous solution of potassium dichromate (pH 2–8) in a series of glass membranes with the prevailing pore radii from 4.5 to 70 nm were determined. Characteristic features of variation of the diffusion coefficient were correlated with the calculated content of ...
potassium dichromate (K2Cr2O7) at a small pH value, and Ag+ will precipitate in the form of silver oxide (Ag2O) when the pH is too high. Commonly, the suitable acidity range is pH = 6.5~ 10.5, but when there are ammonium salts in solution, the solution acidity pH = 6.5~7.2 is ...
Potassium ferricyanide(III) is a potassium salt widely employed as an external indicator in potassium dichromate titrations. A sensor containing potassium ferricyanide assisted enzyme electrode for estimating maltose and glucose in samples has been reported. Addition of potassium ferricyanide in the catholy...