Friday, March 4, 2011

Rate of Reaction in Daily Life

Have you ever wonder how the charcoal can burn easily when in small sizes? Ever wonder why your mom cook small sized foods instead of clumps? Yes, these are all application that human learnt from the art of Chemistry since thousands of years ago.


In Chemistry field, rate of reaction can be defined as how fast or slow, a reactant reacts with another reactants in given time. One such example is how much time needed for hydrogen (H) gas react with diatomic chlorine (Cl) to form hydrochloric acid (HCl).

There are five factors that affects rate of reaction : Temperature, Concentration (for liquid reactant), Surface Area (for solid ones), Pressure (For gasseous) and Catalysts. Presence of these factors can alter the result of the reaction, physically and chemically.

When a chemical reaction occurs, two different molecules will collide on each other. When the molecules collide, activation energy will occur. Depending on the temperature, when it is in equilibrium, a new product based on the reactants will be formed. Take formation of salts for instance. Our food preservatives, table salt, occurs by the reaction between sodium hydroxide (NaOH) and Hydrochloric Acid (HCl).

NaOH (aq) + HCl (aq) = NaCl (aq) + H20 (l)

The rate if reaction in chemistry field was studied over years, and applied on many other fields. One such examples was Contact Process, which produces Sulphur Dioxide by going through a catalyst Iron.

That's all for today!!!

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