Oxidation of alcohols

Numéro d’image : 12635678
Oxidation of alcohols
Oxidation of alcohols. Oxidation of a primary and secondary alcohols by potassium dichromate (VI) (K2Cr2O7). In the process chromium is reduced from +6 oxidation state to +3 oxidation state. This is physically observed as a colour change from orange to green to blue. Here 0.4 mL of 0.23M solution of potassium dichromate acidified with sulfuric acid (H2SO4) was added to two test tubes each containing 6.5 mL of ethanol (centre, C2H5OH) and isopropanol (right, C3H7OH). Ethanol is a primary alcohol and isopropanol is a secondary alcohol. A test tube with 0.25 M solution of potassium dichromate (VI) (left, orange) is included as a reference.
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Crédit: Science Photo Library / Giphotostock
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