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Hydrogen atoms can react with oxygen atoms forming different compounds. There are mainly two types, one is water and the other is hydrogen peroxide

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Oxides of Hydrogen Introduction: Hydrogen atoms can react with oxygen atoms forming different compounds. There are mainly two types, one is water and the other is hydrogen peroxide. Structure: A water molecule is made up of two hydrogen atoms and one oxygen atom joining together by covalent bonds. The shape of it is bent and its bond angle is of 105�. The structure is shown below. A hydrogen peroxide molecule consists of two hydrogen atoms and two oxygen atoms joined together by covalent bonds. It is relatively unstable in sunlight as repulsion exists between non-bonded electrons in the oxygen atoms, forming free radicals easily. The structure is shown below: Water and hydrogen peroxide have a simple molecular structure and held by hydrogen bonds. The slightly positive charged hydrogen atom is attracted by the lone pair electrons on the oxygen atoms. Physical Properties: Both water and hydrogen peroxide have a high melting point and boiling point due to the presence of hydrogen bonds between the molecules of them. ...read more.


(4200 J kg-1 �C-1) Hydrogen peroxide is miscible with cold water and is soluble in alcohol and ether. Although pure hydrogen peroxide is fairly stable, it decomposes into water and oxygen when heated above about 80�C Occurrence and synthesis: Water is a naturally occurring substance and most of the earth's surface is sea. But water from sea is impure. To obtain pure water, simple distillation is practical. Hydrogen peroxide can be prepared by autoxidation of 2-ethylanthraquinol. Chemical properties: Water is involved in many chemical reactions. Reaction with metals: Water can react with reactive metals like potassium, sodium and calcium to forming metal hydroxide and hydrogen gas. 2K(s) + 2H2O(l) � 2KOH(aq) + H2 (g) When water is in gaseous state, it can react with magnesium, aluminium, zinc and iron to form metal oxide and hydrogen gas. Mg(s) + H2O(g) � MgO(s) + H2 (g) Reaction with s-block metal hydrides: All s-block metal hydrides can react with water to form hydrides and hydrogen. ...read more.


2MnO4-(aq) + 16H+(aq) + 10H2O2(aq) � 2Mn2+(aq) + 8H2O(l) + 5O2(g) + 10H+(aq) Free Radical Addition: Hydrogen Peroxide can be used for the production of free radicals. CH3CH=CH2 HBr/peroxide CH3CH2CH2Br non-polar solvent Importance: Water is essential to our daily lives. It can act as a coolant in car engines for absorbing a large amount of heat with only a small rise in temperature. It can also used as solvent so as to dissolve many polar substances. It is an essential component in living things as it governs many cellular reactions inside our body and it is one of the raw materials in photosynthesis. Hydrogen peroxide can act as an additive for the polymerization of organic compounds. Farmers can also spray dilute hydrogen peroxide to increase the crop yields. It is even required for the production of thyroid hormone and sexual hormones and help regulate the amount of oxygen getting to our cells. It is used in fuels for rockets and torpedoes and used as a bleaching agent for textiles, e.g., wool and silk, and in paper manufacture. It is also used in chemical manufacture. End of the Essay ...read more.

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