The speed of chemical reactions, factors influencing the speed.

A chemical reaction is a change in concentration over a period of time, which means that chemical reactions differ in time and must occur at the end of the reaction. The concentration of products and reagents is constant over time, but some reactions take a very short time (very fast) and occur like fireworks.

Factors that affect the rate of a chemical reaction are the nature of the reactants, reactant concentration, reaction temperature, and catalyst. The rate of a chemical reaction can be measured practically by the rate of elimination of reagents or the rate at which results appear.



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