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The sulfochromic mixture is prepared by dissolving either potassium dichromate (K2Cr2O7) or sodium dichromate (Na2Cr2O7) in concentrated sulfuric acid.
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sulphochromic acid: mix 12 mL of sat'd aqueous solution of chromium trioxide acid with 2.7L of H2SO4 =»ÇËá¸õ
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