![]() ![]() Other important applications of this compound are as a mordant in the textile industry in tanning leather to dissolve gelatin to impart green color to paints, varnishes, inks, and ceramic glazes and as a catalyst. It is used for chrome plating of other metals for protective and decorative purposes. 18H 2OĬhromium(III) sulfate is used as the electrolyte for obtaining pure chromium metal.15H 2O and the octadecahydrate Cr 2(SO 4) 3.Standard Methods for The Examination of Water and Wastewater, 20th ed., Washington, DC: American Public Health Association.) CHROMIUM(III) SULFATEįormula: Cr 2(SO 4) 3 MW 392.16 several hydrates are known these include the pentadecahydrate Cr 2(SO 4) 3 Cr 6+ is separated from Cr 3+ on a column, and derivatized with an azide dye as a colored product measured at 530 nm, which is identified from its retention time. ![]() For this, the aqueous sample is adjusted to pH 9 to 9.5 with a concentrated buffer (ammonium sulfate and ammonium hydroxide mixture) and mixed into the eluent stream of the buffer. Hexavalent chromium (Cr 6+) may be analyzed by ion chromatography. Chromium may be measured in the aqueous phase by AA, ICP or x-ray techniques, or in the solid phase by x-ray methods. The compound may be identified from its dark red color. However, fluorination with F 2 yields the oxohalide, CrOF 4.Įlemental composition: Cr 52.00%, O 48.00%. Reaction with hydrochloric acid yields chromyl chloride:Ī similar reaction occurs with HF to yield chromyl fluoride CrO 2F 2. ![]()
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