Sum of exponents of molar concentration is called___________________?
Correct answer: A. Order of reaction
- A. Order of reaction
- B. Molecularity
- C. Rate of reaction
- D. Average of reaction
Explanation
In a rate law such as rate = k[A]^m[B]^n, the sum of the exponents m + n is the overall order of the reaction. Students may choose molecularity because both concepts involve reaction species, but molecularity applies to an elementary step, whereas order is obtained from the rate expression.
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About Order of Reaction
Reaction order shows how the rate depends on the concentration of each reactant, as expressed in the rate law. Coverage includes zero, first and second-order reactions, integrated rate equations, half-life, units of rate constants and the distinction between overall order and molecularity.
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