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The order of reaction is ..................

The order of reaction is ............... determined.

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The order of reaction is an experimentally determined quanity. It may be zero, poistive, negative, or fractional. The kinetic equation of nth order reaction is k xx t = (1)/((n-1))[(1)/((a-x)^(n-1)) - (1)/(a^(n-1))] …(i) Half life of nth order reaction depends on the initial concentration according to the following relation: t_(1//2) prop (1)/(a^(n-1)) ...(ii) The unit of the rate constant varies with the order but general relation for the unit of nth order reaction is Units of k = [(1)/(Conc)]^(n-1) xx "Time"^(-1) ...(iii) The differential rate law for nth order reaction may be given as: (dx)/(dt) = k[A]^(n) ...(iv) where A denotes the reactant. In a chemical reaction A rarr B , it is found that the rate of the reaction doubles when the concentration of A is increased four times. The order of the reaction with respect to A is:

The order of a reaction is determined from:

Assertion (A) : The order of a reaction may be defined as the sum of the powers to which the concentration terms are raised in order to determine the rate of reaction gives the total order of reactions. Reason (R) : The number of molecules whose concentrations determine the ratio of reaction at a given temperature is called order to the reaction.

Which of the following statemen is /are correct about order of a reaction? I. The order of a reaction can be a fractional number. II. Order of a reaction is experimentally determined quantity. III. The order of a reaction is always equal to the sum of the stoichimetric coefficients of reactants in the balanced chemical equation for a reaction. IV. The order of a reaction is the sum of the powers of molar concentration of the reactants in the rate law expression. Choose the correct option.

Determining the order of reaction from the rate law: Bromide ion is oxidized by bromate ion in acidic solution. 5Br^(-)(aq.)+BrO_(3)^(-)(aq.)+6H^(+)(aq.)rarrBr_(2)(aq.)+3H_(2)O(l) The expermentally determined rate law is "Rate" = k[Br^(-)][BrO_(3)^(-)][H^(+)]^(2) What is the order of reaction with respect to each of the reactants and what is teh overall reaction order ? Strategy : To find the reaction order with respect to each reactant, look at the exponents in the rate law, not the coefficients in the balanced chemical equation, and then sum the exponents to obtain the overall reaction order.