Ethanol oxidation, 3 of 3. Oxidation of a primary alcohol (ethanol, C2H5OH) 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 a test tube with 6.5 mL of ethanol. The reaction rate was slow, Photo 1 was taken at the start, Photo 2 - after 30 min and Photo 3 - after 5 hours. A test tube with 0.25 M solution of potassium dichromate (VI) (left, orange) is included as a reference. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Giphotostock |
Bildgröße: | 3370 px × 5096 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |