Natural Hydrogen Peroxide

Hydrogen Peroxide

 

natural hydrogen peroxide:

 

physical properties
1. Appearance and state: Pure hydrogen peroxide is a colorless viscous liquid at room temperature, similar in appearance to water but with a higher density.
2. Boiling point and melting point: Its boiling point is about 150.2 ° C, much higher than the 100 ° C of water, mainly due to the stronger hydrogen bonds between hydrogen peroxide molecules. The melting point is -0.43 ° C, close to water.
3. Miscibility: Hydrogen peroxide can be miscible with water, ethanol, and ether in any ratio, making it easy to prepare solutions of different concentrations and convenient for transportation and use.
4. Concentration labeling: The commonly used hydrogen peroxide solution on the market is usually an aqueous solution, and the concentration is expressed as a mass volume percentage. For example, the concentration of hydrogen peroxide commonly used for disinfection in pharmacies is 3%, which means that every 100 milliliters of solution contains 3 grams of H ₂ O ₂. In industry, there are solutions with higher concentrations, such as 30%, 50%, or even 70%.

 

Chemical properties (core part):
The chemical properties of hydrogen peroxide are extremely active and complex, and its core characteristics can be summarized as "instability" and "redox amphoteric".

Pure hydrogen peroxide will spontaneously decompose under light and heating conditions, and the reaction equation is:
2H ₂ O ₂ (l) → 2H ₂ O (l)+O ₂ (g)+heat
This reaction is a typical self oxidation-reduction reaction and also an exothermic reaction.

Oxidation and Reduction (Sexual Characteristics)
The oxidation state of oxygen atoms in hydrogen peroxide molecules is -1, which is between -2 in water and 0 in oxygen. This intermediate valence state determines that it can be oxidized (to zero valence) and exhibits reducibility; It can also be reduced (to -2 valence) and exhibit oxidizing properties. However, in most cases, especially in acidic or neutral media, its oxidizing properties are more prominent.

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