How did Louis-Jacques Thenard discover hydrogen peroxide?
Discovery. Hydrogen peroxide was first described in 1818 by Louis Jacques Thénard, who produced it by treating barium peroxide with nitric acid. An improved version of this process used hydrochloric acid, followed by addition of sulfuric acid to precipitate the barium sulfate byproduct.
What is Louis-Jacques Thenard known for?
Louis-Jacques Thenard was a French chemist born May 04, 1777 – died on June 21, 1857. Thenard is the discoverer of hydrogen peroxide. His first original paper (1799) was on the compounds of arsenic and antimony with oxygen and sulphur. In 1807, he began important research into ethers.
Who made hydrogen peroxide?
Louis Jacques Thénard
Hydrogen peroxide was discovered in 1818 by Louis Jacques Thénard (Fig. 1), professor at the Collège de France (1).
Who invented peroxide?
How long does it take hydrogen peroxide to decompose?
Research indicates a sealed bottle of 4% hydrogen peroxide decomposes from 4.2% to 3.87% within three years, while a 7.5% solution degrades from 7.57% to 7.23% in three years.
How do you slow down the decomposition of hydrogen peroxide?
The decomposition of hydrogen peroxide can be slowed by the addition of a small amount of acetamide. The latter acts as a. Inhibitors are also catalysts but that slow down the rate of reaction.
What can you do with expired hydrogen peroxide?
You can dispose of expired hydrogen peroxide that you bought from a pharmacy by pouring it down the sink. Higher concentrations of hydrogen peroxide need to be diluted with water before they’re thrown out.
What is the best catalyst for the decomposition of hydrogen peroxide?
Manganese oxide (MnO2) is widely used in heterogeneous reaction of decomposition of hydrogen peroxide thanks to its excellent catalytic efficiency in this reaction.
What property of hydrogen peroxide is responsible for its bleaching action?
The bleaching action of H2O2 is due to labile oxygen which it releases on decomposition. H2O2→H2O+[O] The nascent oxygen combines with coloured material and makes it colourless. It can bleach feather, silk, wool, ivory, etc. It can also bleach paper, oils and fats.
What is the meaning of Thénard’s blue?
1. (Elements & Compounds) Also called: Thénard’s blue any greenish-blue pigment containing cobalt aluminate, usually made by heating cobaltous sulphate, aluminium oxide, and phosphoric acid together 2. (Colours) b. ( as adjective ): a cobalt-blue car.
What is the meaning of Thenar?
Noun 1. thenar- the fleshy area of the palm at the base of the thumb region, area- a part of an animal that has a special function or is supplied by a given artery or nerve; “in the abdominal region” palm, thenar- the inner surface of the hand from the wrist to the base of the fingers
What is the thenar of the palm?
1. thenar- the fleshy area of the palm at the base of the thumb region, area- a part of an animal that has a special function or is supplied by a given artery or nerve; “in the abdominal region” palm, thenar- the inner surface of the hand from the wrist to the base of the fingers
What is the difference between thenar and region?
region, area- a part of an animal that has a special function or is supplied by a given artery or nerve; “in the abdominal region” palm, thenar- the inner surface of the hand from the wrist to the base of the fingers