Factors Affecting the Reaction Rate
Understanding Reaction Rate
The reaction rate can be defined as a change in the concentration of reagents or the product of time unity. This means that there is a reduction in the concentration of reagents or increase the concentration of the product per unit of time (Keenan, 1990). Reaction rate or reaction rate is the rate or rate of reduction of reactants or the formation of reaction products that can be expressed in units (concentrations per time) mol / L / s (for liquid and solid substances), or atm / s (for gaseous substances). Reaction speed is the number of moles / liters of a substance that can be turned into another substance in each unit of time. The equation for the reaction rate is;
V = K [A] [B] 2
Where V is the reaction rate, K is the reaction rate constant and [A] [B] is the concentration of the reacting substance. The rank value expresses the coefficient of the substance or order of the reaction. Reaction order means describing the level of reaction or the relationship between concentration and speed (Petrucci, 1985).
The reaction rate equation has two main applications, namely practical application and theoretical application. It is said for practical application is where the equation of reaction rate and reaction rate constants are known, it can be predicted the reaction rate of a mixture composition, while the theoretical application is where the equation rate is used to determine the reaction mechanism (Atkins, 1990).
The rate of reaction is measured, often proportional to the reactant concentration of a power. For example, the rate is proportional to the concentrations of the two reactants A and B, so that;
V = K [A] [B] 2
The coefficient K is called a rate constant that does not depend on concentration but depends on temperature. This kind of equation that is formed experimentally is called the law of reaction rate. Formally, the law of rate is an equation that states the rate of reaction V as a function of the concentration of all existing species including products (Atkins, 1990).
The rate of reaction is also called the coefficient of rate or rate of type reaction, with k (constant). The rate constant is the ratio constant between the reaction rate and the result times the concentration of the species that affects the reaction rate. The rate constant is also a change in the concentration of reactants or reaction products per unit time in a reaction if the concentration of all reactants is equal to one.