Which one of the following statement for order of reaction is not correct:a)Order can be determined experimentallyb)Order of reaction is equal to sum of the powers of concentration terms in differential rate lawc)It is not affected with the stoichiometric coefficient of the reactants.d)Order cannot be fractionalCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Out of all four statements option D is not correct since an order of reaction can be 1, 2, 3 ... and even fractional also.

Also, an order can be determined experimentally and if is not affected by the stoichiometric coefficient of the reactants.

Answer

Out of all four statements option D is not correct since an order of reaction can be 1, 2, 3 ... and even fractional also.

Also, an order can be determined experimentally and if is not affected by the stoichiometric coefficient of the reactants.

Answer

Out of all four statements option D is not correct since an order of reaction can be 1, 2, 3 ... and even fractional also.

Also, an order can be determined experimentally and if is not affected by the stoichiometric coefficient of the reactants.

Answer

Order of Reaction

The order of a reaction is a measure of how the concentration of reactants affects the rate of the reaction. It is determined experimentally and can be used to understand the rate equation or rate law of a reaction.

a) Order can be determined experimentally

The order of a reaction cannot be predicted based solely on the balanced chemical equation. It can only be determined experimentally by measuring the rate of the reaction at different concentrations of the reactants. By varying the concentrations and observing the corresponding changes in the reaction rate, the order of the reaction can be determined.

b) Order of reaction is equal to sum of the powers of concentration terms in differential rate law

The rate law of a reaction expresses the relationship between the rate of the reaction and the concentrations of the reactants. It can be determined experimentally and may not necessarily be equal to the stoichiometric coefficients of the reactants in the balanced chemical equation. The order of reaction is determined by summing the powers of the concentration terms in the rate law equation.

c) It is not affected by the stoichiometric coefficient of the reactants

The stoichiometric coefficient of a reactant in the balanced chemical equation represents the number of moles of that reactant involved in the reaction. However, the order of reaction is not directly affected by these coefficients. The order is determined by the experimental data and may not necessarily be the same as the stoichiometric coefficients.

d) Order cannot be fractional

The order of a reaction can be a whole number, zero, or even a fraction. A fractional order indicates that the rate of the reaction is not directly proportional to the concentration of a reactant. This can occur in certain complex reactions where the rate-determining step involves multiple reactants with different concentrations. However, it is more common to have whole number orders for most simple reactions.

Therefore, the statement that 'order cannot be fractional' is incorrect. The order of a reaction can indeed be fractional depending on the experimental data and the rate law equation derived from it.

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