Class 12

Experimental Determination of Order of a Reaction (1) Graphical method This method is used when there is only one reactant. It involves the following steps: 1) The concentrations of the reactants are measured by some suitable method. 2) A graph is plotted between concentration and time. 3) The instantaneous rates of the reaction at different times are calculated by … [Read more...] about Experimental Determination of Order of a Reaction

Integrated Rate Expression The concentration dependence of rate is called differential rate equation. Integrated rate equation gives a relation between directly measured experimental quantities i.e. concentrations at different times. The integrated rate equations are different for reactions of different orders. The instantaneous rate of a reaction is given by differential … [Read more...] about Integrated Rate Expression

Molecularity of a Reaction  For a chemical reaction to occur, the reacting molecules must collide with each other. The number of reacting species (molecules, atoms or ions) which collide simultaneously to bring about a chemical reaction is called molecularity of a reaction. If a reaction involves the decomposition of only a single species, the molecularity is one or it is … [Read more...] about Molecularity of a Reaction

Order of a Reaction The order of a reaction is defined as: the sum of the powers to which the concentration terms are raised in the rate law equation to express the observed rate of the reaction. The power of the concentration of a particular reactant in the rate law is called the order of the reaction with respect to that reactant. If the rate of a reaction, aA + … [Read more...] about Order of a Reaction

Factors Influencing rates of chemical reaction  There are a number of factors which influence the rate of a reaction. Some of the important factors are: 1) Concentration of the reacting species. 2) Temperature of the system 3) Nature of the reactants and products. 4) Presence of a catalyst. 5) Surface area. 6) Exposure to radiation. 1) Concentration of the … [Read more...] about Factors Influencing Rates of Chemical Reactions