Hydrogen peroxide-Potassium carbonate

Addition of an oxidising agent to a solution of an iodide (for example concentrated sulphuric acid, hydrogen peroxide, potassium dichromate) yields iodine the iodine can be recognised by extracting the solution with carbon tetrachloride which gives a purple solution of iodine. 

Carbons prepared at 850° C to 950° C appear more effective for some oxidations, e.g., hydroquinone, sodium thiosulfate, potassium urate, and for the decomposition of hydrogen peroxide whereas, carbons prepared at lower temperatures, in the range of 450° to 600° C, have been found more effective for the oxidation of sodium arsenite and potassium nitrite.1 It should be mentioned that certain of these specific effects are not supported by all data. 

EXPLOSION and FIRE CONCERNS a highly flammable liquid NFPA rating Health 2, Flammability 2, Reactivity 1 vapors form explosive mixtures with air, explosive reactions with bromine pentafluoride, chromium trioxide, hydrogen peroxide, potassium permanganate, sodium peroxide ignites on contact with pot issium-tert-butoxide incompatible or reacts violently with acetaldehyde, acetic anhydride, chromic acid, nitric acid, ammonium nitrate, chlorine trifluoride, (nitric acid + acetone), perchloric acid, potassium hydroxide, sodium hydroxide, xylene use water spray, dry chemical, foam, or carbon dioxide for firefighting purposes. 

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