Catalyzed decomposition of H2O2.
Catalysts are substances that accelerate chemical reactions but are not themselves consumed. Consider the effect of a catalyst on the decomposition of hydrogen peroxide, H2O2, to form water and oxygen.
2 H2O2 (aq) -> O2 (g) + 2 H2O (l)
This composition is very slow; a solution of H2O2 can be store for many months with only minimal change in concentration. Adding manganese (IV) oxide, an iodidr-containing salt, or a compound call catalase-an example of a biological catalyst or enzyme-causes this reaction to occur rapidly, as shown by vigorous bubbling as gaseous oxygen escapes from the solution
The surface area of a solid reactant can also affect the reaction rate. Only molecules at the surface of a solid can come in contact with other reactants. The smaller the particles of a solid, the more molecules are found on the solid’s surface. With very small particles, the effect of surface area on rate can be quite dramatic. Farmers know that explosions of fine dust particles (suspended in the air in an enclosed silo or at a feed mill) represent a major hazard
Catalyzed decomposition of H2O2.
Catalysts are substances that accelerate chemical reactions but are not themselves consumed. Consider the effect of a catalyst on the decomposition of hydrogen peroxide, H2O2, to form water and oxygen.
2 H2O2 (aq) -> O2 (g) + 2 H2O (l)
This composition is very slow; a solution of H2O2 can be store for many months with only minimal change in concentration. Adding manganese (IV) oxide, an iodidr-containing salt, or a compound call catalase-an example of a biological catalyst or enzyme-causes this reaction to occur rapidly, as shown by vigorous bubbling as gaseous oxygen escapes from the solution
The surface area of a solid reactant can also affect the reaction rate. Only molecules at the surface of a solid can come in contact with other reactants. The smaller the particles of a solid, the more molecules are found on the solid’s surface. With very small particles, the effect of surface area on rate can be quite dramatic. Farmers know that explosions of fine dust particles (suspended in the air in an enclosed silo or at a feed mill) represent a major hazard
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