Respuesta :
Answer: The exponents in the rate law MUST be determined by experiment.
Explanation:
Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.
Order of the reaction is defined as the sum of the concentration of terms on which the rate of the reaction actually depends. It is the sum of the exponents of the molar concentration.
Order with respect to each reactant is determined experimentally and match the coefficients in the balanced chemical reaction for elementary reactions.
In equations, if the order with respect to each reactant is not equal to its stoichiometric coefficient which is represented in the balanced chemical reaction are complex reactions.
The exponents in the rate law MUST be determined by experiment is the correct statement.
What do you understand from rate law?
Rate law of any chemical reaction tells about the speed of the completion of the reaction and it is directly proportional to the concentration of reactant each raised to a stoichiometric coefficient.
Stoichiometry coefficient will always be obtain experimentally known as order, because it is differs for elementary and complex reactions. Order with respect to each reactant is determined experimentally and match the coefficients in the balanced chemical reaction for elementary reactions. And order of the reaction is the sum of the order of each reactants involved.
Hence, option (2) is correct.
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