Advice 1: How to prepare a solution of hydrogen peroxide

Peroxide of hydrogen has found wide application in everyday life and medicine. as a disinfectant and antiseptic, and colorant. During both receiving and using it requires following certain rules.
How to prepare a solution of hydrogen peroxide
Instruction
1
Peroxide of hydrogen can be used not only to treat the mechanical damage of the skin - small wounds and cuts. Last of a 3% solution of this substance used for the treatment of pneumonia, and various viral, dermatological and venereal diseases. Before the discovery of penicillin peroxide was administered intravenously to people with diseases of the lungs and bronchi.In our days the feasibility of such an application of peroxide of hydrogen disputed. Some experts agree that this practice has yielded positive results, while others claim that the peroxide of hydrogen for oral administration is not suitable. However, its external application is still ongoing.
2
In order to make a 3% solution of peroxide of hydrogen, initially will receive its concentrated solution. The easiest way to get it in the lab - use impacts of metal oxides in dilute sulphuric acid. So, for example, barium oxide in cold conditions, connecting with sulfuric acid, forms peroxide of hydrogen and salt - barium sulfate: BaO2+H2SO4=H2O2+BaSO4 In the industry sulphuric acid is obtained by electrolysis of sulfuric acid, followed by hydrolysis nadkarni acid: 2H2SO4=H2S2O8+2H+ + 2e-,H2S2O8+2H2O=2H2SO4+H2O2 Also peroxide of hydrogen is obtained by oxidation of isopropyl alcohol. It is formed in nature by oxidation of various substances with oxygen. In addition, small concentrations of it found in animal cells.
3
After the resulting concentrated solution of peroxide of hydrogen, prepare it a 3% solution. To do this, take an enamel bowl, pour water into it temperaturoi about 50 degrees, then add the peroxide of hydrogen in an appropriate amount.Peroxide of hydrogen, in addition to its medical purpose, is also used in industry. For example, it is used for bleaching fabrics and paper. Also, it is a good disinfectant in the food industry. Peroxide of hydrogen - decolorizing agent, and therefore it has found wide application in cosmetology.

Advice 2 : How to use hydrogen peroxide for disinfection

Hydrogen peroxide has strong antimicrobial properties and is recommended for use for disinfecting wounds, tools, different surfaces and disinfection of premises. For each of these purposes has a particular concentration of the drug.
How to use hydrogen peroxide for disinfection
You will need
  • hydrogen peroxide;
  • - instruction No. 858-70 from 29.08.1970
Instruction
1
Hydrogen peroxide is a weak acid, this substance consists of water and hydrogen. Due to its high oxidizing properties, H2O2 is a strong bleaching and disinfecting agent. This is due to the fact that upon contact of hydrogen peroxide with any surface starts quick reaction, in which the released oxygen free radicals. They damage cells and tissues protective coating bacteria so that pathogens are killed.
2
Depending on what you need to process, H2O2 is used in different concentrations. For preparation of working disinfectant used concentrated 35% solution of perhydrol. There are official instructions on the use of H2O2, which defines the required proportions.
3
In most cases used 3-6% solution of hydrogen peroxide. The exposure time required for destruction of pathogens, may be 30 to 180 minutes. Allowed to wipe, spray, immerse, soak the objects of sanitation in the working solution.
4
With the help of hydrogen peroxide can disinfect sanitary-technical equipment, including metal, plastic, rubber, plastic and glass; sterilizing surgical instruments and medical diagnostic instruments; to bleach and disinfect linen.
5
You soak it in 3% hydrogen peroxide for 40 minutes, after disinfection, to wash and rinse with running water for at least 5 minutes. Surfaces in premises, furniture, surfaces of instruments and apparatus should be wiped with a cloth soaked with working solution.
6
For preparation of working solution, take an enamel bowl no chips, dial 500 ml of warm (50-55oC with) drinking water, add the required quantity of perhydrol ( in accordance with instruction No. 858-70 from 29.08.1970) and bring the volume to 1 liter.
7
For sterilization of surgical instruments in the working solution was added 1.4 g anti-corrosive agent sodium oleate and 10 g of detergent "LOTOS" or its analogues.
8
The flow rate of the drug when wiping 200 ml/1 sq. m.; together with a detergent 100 ml/1 sq. m.; under irrigation from gidroperita 300 ml/1 sq. m. At the expiry of the specified time the surface must be washed with water and ventilate the area.
9
Dilution of concentrated perhydrol is important to avoid its contact with skin or ingested, it can be deadly. In the preparation of working solutions should wear protective clothing, goggles, household rubber gloves and a respirator.
Note
In case of accidental poisoning the respiratory tract with hydrogen peroxide need to give warm alkaline drink (milk or water), rinse mouth and nasal passages with water and consult a doctor. After contact of the drug inside submit 10-15 crushed tablets of activated charcoal and urgently call an ambulance. Vomiting might not be called, not to add burns to mucous.
Useful advice
Working solutions for disinfection should be used once. The drug should be stored in a dark place in a labelled container with the lid tightly closed.

Advice 3 : How to get hydrogen peroxide

Peroxide of hydrogen – heavy polar bluish liquid with a melting point T ( ~ )=-0,41 C and a boiling point T(Kip.)=150,2 C. Liquid peroxide H2O2 has a density of 1.45 g/cm^3. In everyday life and in laboratory conditions typically use a 30% aqueous solution (perhydrol) or 3% solution of the substance.
How to get hydrogen peroxide
Instruction
1
H2O2 molecules in the liquid state are strongly associated, due to the presence between them of hydrogen bonds. Since hydrogen peroxide can form more hydrogen bonds than water (for every atom of hydrogen has more atoms of oxygen), its density, viscosity and boiling point, respectively, above. It mixes with water in all respects, and pure peroxide and concentrated the solution in the light explode.
2
At room temperature, H2O2 catalytically decomposes to release atomic oxygen, hence its use in medicine as a disinfectant means. Usually take the 3% antiseptic solution.
3
In the industry hydrogen peroxide is obtained in the reactions with organic compounds, including, for example, catalytic oxidation of isopropyl alcohol:

(CH3)2CHOH+O2=(CH3)2CO+H2O2.

Acetone (CH3)2CO is a valuable byproduct of such a reaction.
4
Also H2O2 is produced industrially by electrolysis of sulfuric acid. In this process, the persulfuric acid is formed, the subsequent decomposition of which gives the peroxide and sulfuric acid.
5
In the laboratory peroxide get usually the action of dilute sulphuric acid on barium peroxide:

BaO2+H2SO4(highest.)=BaSO4↓+H2O2.

Insoluble barium sulfate precipitates.
6
The peroxide solution has an acid reaction medium. This is because of the H2O2 molecules dissociate on the type of the weak acid:

H2O2↔H(+)+(HO2)(-).

The dissociation constant of H2O2 – 1,5∙10^(-12).
7
Showing the properties of acids, hydrogen peroxide interacts with bases:

H2O2+Ba(OH)2=BaO2+2H2O.
8
The peroxides of certain metals, such as BaO2, Na2O2, can be considered as salts of hydrogen peroxide is a weak acid. Of them just get in the laboratory H2O2 by the action of stronger acids (e.g., sulfuric), displacing the peroxide.
9
Hydrogen peroxide can react in three types: without a change in the peroxide group, as a reductant or as an oxidant. The last type of the most characteristic reactions for H2O2. Examples:

Ba(OH)2+H2O2=BaO2+2H2O

2KMnO4+5H2O2+3H2SO4=2MnSO4+K2SO4+5O2+8H2O,

PbS+4H2O2=PbSO4+4H2O.
10
The hydrogen peroxide finds wide application. It is obtained from the bleach entered into synthetic detergents, various organic peroxides; it is used in the polymerization reactions for the restoration of paintings on the basis of lead paints and to obtain antiseptic.
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