Anonymous asked in Science & MathematicsChemistry · 1 decade ago

Decomposition of hydrogen peroxide?

Name a substance that will suppress the decomposition of hydrogen peroxide.

9 Answers

  • 1 decade ago
    Best Answer


    Hydrogen peroxide always decomposes (disproportionates) exothermically into water and oxygen gas spontaneously:

    2 H2O2 → 2 H2O + O2

    This process is very favorable thermodynamically. It has a ΔHo of −98.2 kJ·mol−1 and a ΔGo of −119.2 kJ·mol−1 and a ΔS of 70.5 J·mol−1·K−1. The rate of decomposition is dependent on the temperature and concentration of the peroxide, as well as the pH and the presence of impurities and stabilizers. Hydrogen peroxide is incompatible with many substances that catalyse its decomposition, including most of the transition metals and their compounds. Common catalysts include manganese dioxide, and silver. The same reaction is catalysed by the enzyme catalase, found in the liver, whose main function in the body is the removal of toxic byproducts of metabolism and the reduction of oxidative stress. The decomposition occurs more rapidly in alkali, so acid is often added as a stabilizer.

    The liberation of oxygen and energy in the decomposition has dangerous side effects. Spilling high concentrations of hydrogen peroxide on a flammable substance can cause an immediate fire, which is further fueled by the oxygen released by the decomposing hydrogen peroxide. High-strength peroxide (also called high-test peroxide, or HTP) must be stored in a suitable,[citation needed] vented container to prevent the buildup of oxygen gas, which would otherwise lead to the eventual rupture of the container.

    In the presence of certain catalysts, such as Fe2+ or Ti3+, the decomposition may take a different path, with free radicals such as HO· (hydroxyl) and HOO· being formed. A combination of H2O2 and Fe2+ is known as Fenton's reagent.

  • cosner
    Lv 4
    3 years ago

    Hydrogen Peroxide Decomposition

  • 3 years ago

    Decomposition Of Hydrogen Peroxide

  • Anonymous
    1 decade ago

    A method and composition for suppressing or inhibiting the decomposing action of enzymes on hydrogen peroxide, e.g. peroxidase and catalase, during bleaching of cellulose fibres with hydrogen peroxide, especially in connection with the production of recycled paper, in such a way that microorganisms are not markedly affected, and discharges that are dangerous to the environment are minimized. The composition contains hydroxylamine, thiocyanate salts, formic acid, ascorbic acid or nitrites.

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  • 4 years ago


    Decomposition of hydrogen peroxide?

    Name a substance that will suppress the decomposition of hydrogen peroxide.

    Source(s): decomposition hydrogen peroxide:
  • Anonymous
    1 decade ago

    Acetanilide, ethanol are acts as negative catalyst in the decomposition of H2O2

  • Lv 7
    1 decade ago

    Manganese dioxide (MnO2) works very well. It can be obtained by cutting open a dry cell battery.

    Another thing you can try is catalase. This is contained in liver and potato. Don't try to isolate it though.

  • Anonymous
    1 decade ago


  • Anonymous
    6 years ago


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