Chromium trioxide is a corrosive, reddish-brown, inorganic compound that is widely used in the production of a variety of chemicals. It is usually made by the reaction of sodium dichromate with sulfuric acid, or by the oxidation of chromium metal with hydrochloric acid. The following is a general outline of the process for making chromium trioxide:
Start with a solution of sodium dichromate in water.
Slowly add sulfuric acid to the solution, stirring constantly, until the pH reaches 1-2.
Allow the mixture to react for several hours, until the formation of chromium trioxide is complete.
Filter the mixture to remove any solid impurities.
Wash the chromium trioxide with water to remove any remaining impurities.
Dry the chromium trioxide by heating it in an oven or by exposing it to air.
It is important to handle chromium trioxide with caution, as it is highly toxic and can cause severe burns if it comes into contact with skin or eyes. Protective equipment, such as gloves, goggles, and a lab coat, should be worn when handling this compound.
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