It must also be kept away from dust particles as dust can induce explosive decomposition of this compound. Therefore, Hydrogen Peroxide can be stored in wax-lined glass or plastic containers and are kept in the dark. This decomposition process is catalyzed by traces of alkali metals. When exposed to sunlight, Hydrogen Peroxide decomposes. The following reactions depict the picture: Hydrogen Peroxide acts both as an oxidizing as well as the reducing agent in acidic and also in basic medium. Hydrogen Peroxide is soluble in ether, alcohol but insoluble in petroleum ether.Ĭhemical properties of Hydrogen Peroxide are as follows: Its density is 1.11g/cc in aqueous solution and 1.450 g/cc in its pure form. It forms a homogeneous mixture in water in all proportions and forms hydrates.ģ4.0147 g/mol is the molar mass of Hydrogen Peroxide. The melting point of Hydrogen Peroxide is -0.43 C. Its boiling point has been extrapolated at a temperature as high as 150.2 C which is almost 50 C higher than the boiling point of water. Hydrogen Peroxide is almost colorless (very pale blue) in a pure state. The properties of Hydrogen Peroxide are as follows: Peroxodisulphate then needs to be hydrolyzed to get Hydrogen Peroxide.ĢHSO− 4 (aq) Electrolysis−→−−−−−−− HO 3 SOOSO 3 H(aq) Hydrolysis−→−−−−−−− 2HSO− 4 (aq)+2H+(aq)+H 2 O 2 (aq) When acidified sulfate solution is electrolyzed at high current density, peroxodisulphate can be obtained.

The following reaction vouches for the fact:īaO 2. When acidification of barium Peroxide takes place and the excess water is removed by the process of evaporation under reduced pressure, we obtain Hydrogen Peroxide. Various methods are involved in the preparation of Hydrogen Peroxide: Hence, the bent molecular shape is formed. The Hydrogen atoms will always repel the un-bonded electrons of oxygen. This proves the valence shell electron repulsion theory. Two pairs of unbound electrons will be present in both oxygen atoms. The diagram shows that there are two planes in the structure and each plane has one O-H pair, the angle between both the planes is 90.2°, The length of O-O bond is 145.8 pm and the O-H bond length is 98.8 pm(which equals to 9.88 × 10-13 m). The following diagram will explain the statement. The structure for this compound is also popularly known as open book structure. The structure of Hydrogen Peroxide is non-planar which means that it has a three-dimensional quality. Richard Wolfenstein first obtained pure Hydrogen Peroxide in 1894. These impurities catalyze the decomposition of the Hydrogen Peroxide. This instability was present owing to traces of impurities (transition-metal salts). Pure Hydrogen Peroxide was initially believed to be unstable since early experiments to separate it from the water, which is present during synthesis,- all failed. In 1811, Thénard and Joseph Louis Gay-Lussac synthesized sodium Peroxide. This method was followed from the end of the 19th century until the middle of the 20th century. An advanced version of Thénard's method used hydrochloric acid, followed by addition of sulfuric acid to precipitate the barium sulfate by-product. He described it as eauoxygénée (French: oxygenated water) – which came to be known as Hydrogen Peroxide. After nineteen years, Louis Jacques Thénard stated that this compound could be used for the preparation of a previously unknown compound. In 1799, Alexander von Humboldt synthesized barium Peroxide, one of the first synthetic Peroxides, as a by-product of his attempts to decompose air.

Peroxidases are the enzymes that use or decompose Hydrogen Peroxide. It can be found in biological systems including the human body.

Hydrogen Peroxide is generally stored with a stabilizer in a weakly acidic solution since it is unstable. As this compound is unstable, it slowly decomposes in the presence of light. Concentrated Hydrogen Peroxide, also known as 'high-test Peroxide', is a reactive oxygen species and has been used as a propellant in rocket propulsions. Hydrogen Peroxide has basic uses as an oxidizer, bleaching agent and antiseptic. It is the simplest Peroxide (since it is a compound with an oxygen-oxygen single bond). Hydrogen Peroxide is a pale blue, clear liquid, slightly more viscous than water in its pure form. Two molecules of Hydrogen combine with two molecules of oxygen to form Hydrogen Peroxide. Hydrogen Peroxide is a highly unstable chemical compound.

Boiling point of hydrogen