Rate of reaction when concentration of reactants are taken as unity is called_________________?
Correct answer: C. Specific rate constant
- A. Arrhenius constant
- B. Molecularity
- C. Specific rate constant
- D. Ideal rate constant
Explanation
The specific rate constant, or rate constant k, is the reaction rate when the molar concentrations of all reactants in the rate expression are each taken as unity. Students may choose molecularity because it is related to reaction particles, but molecularity describes an elementary step and is not the rate at unit concentration.
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About Rate Constant
The rate constant, k, connects reaction rate with reactant concentrations in a rate law and has a value fixed for a particular reaction at a given temperature. Questions involve determining k from rate data, identifying its units for different reaction orders, and applying the Arrhenius equation to temperature changes.
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