Into an apparatus as illustrated in the following, pour into the anode compartment a salt solution prepared by adding and dissolving 100 grams (3.5
oz.) of potassium dichromate into 700 milliliters (23.7 fluid oz.) of warm water. Thereafter, pour into the cathode compartment, a salt solution
prepared by adding and dissolving 400 grams (14.1 oz.) of Epsom salt into 1700 milliliters (57.5 fluid oz.) of water. Thereafter, put in place the
electrodes as illustrated, and then attach the power clamps; thereafter, turn on the power supply and electrolysize the cell at 6 to 12 volt at 6 amp
DC for 24 hours. After about 24 hours, discontinue the power supply, open the cell, remove the electrodes, and then pull-out the clay pot and pour its
contents into a clean beaker. Thereafter, filter this anode liquid to remove insoluble impurities, and then pour the filtered anode liquid onto a
shallow pan or tray and allow it to air-evaporate forming beautiful dark red crystals of pure chromium trioxide. The cathode liquid will contain allot
of white precipitate of magnesium hydroxide, which can be collected by filtration if desired; after removing the insoluble magnesium hydroxide, the
filtered liquid will contain dissolved potassium sulfate, which can be collected by recrystallization if desired or simply discarded. Kings Chem
Guide Third Edition, by Jared Ledgard, 293-294, 2014*.
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