• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

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

Extracts from this document...


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.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Aqueous Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Aqueous Chemistry essays

  1. How much Iron (II) in 100 grams of Spinach Oleracea?

    present in the 100 grams of Spinach Oleracea. Mass = Moles X Ar The Ar of Iron (II) is 55.9 and therefore: Mass = 0.026083333 mol dm-3 X 55.9 Mass = 1.458058333 mg This answer tells me that there are 1.458 mg's of Iron (II)


    The following oxides will be chosen for the experiment: SiO2, A12O3, PbO, MnO2, ZnO and CuO. 1 gram of each oxide shall be used SiO2, A12O3 and PbO are not transition metal oxide, whereas MnO2, ZnO and CuO are transition metal oxide.

  1. Obtain pure samples of Ethanol (CH3CH2OH) and Ethanoic Acid (CH3COOH) from fermented Yeast (Saccharomyces ...

    At the start of the reaction there are many glucose molecules. These collide often with the yeast enzymes and react, using up the glucose. As the glucose is consumed, there are fewer and fewer glucose molecules to collide with the yeast, so the reaction slows down.

  2. Observation exercise on the compounds of the s-block elements

    As there are no visible indications of a precipitate I believe I can safely say that solution X does not contain a halide. b) To the second part, add 1 cm3 of barium chloride solution followed by an equal volume of dilute hydrochloric acid.

  1. Thermochemistry - calorimetric determination of the dissociation energy of hydrogen peroxide.

    The heat capacity of the calorimeter filled with water is determined by measuring the heat evolved by the reaction of H2SO4 with water DHsol. H2SO4 is added to the calorimeter and the change in temperature is measured. The number of moles of H2SO4 is determined by titration.

  2. Synthesising organic and biochemical compounds - Preparation of Aspirin.

    Both qualitative and quantitative data can be obtained. Modern high performance techniques can identify trace impurities in samples. Chromatography can also be used to separate mixtures on a large scale. There is a range of related techniques. All work on the same principle. A delivery system supplies a mobile phase, which is moved through a stationary phase.

  1. Investigate the effect of changing the hydrogen peroxide concentration on the rate of reaction ...

    Which is going to be 5ml2 3) The same concentration of catalase for each measurement I do. The concentration of the catalase is 2 mouler 4) The hydrogen peroxide I use will all have a concentration of 1 mouler, this is before I mix it with the distilled water.

  2. Synthesising Organic & Biochemical compounds.

    * Add 10g of sodium bromide and 10cm3 of water to the same flask * Set up apparatus ready for reflux. * Pour 10cm3 of concentrated sulphuric acid in the tap funnel and drop in to the pear shaped flask drop by drop over a period of 5 minutes.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work