Question:
The value of rate constant of a pseudo first order reaction
The value of rate constant of a pseudo first order reaction
Updated On: Apr 2, 2024
- Depends only on temperature
- Depends on the concentration of reactants present in small amounts
- Depends on the concentration of reactants present in excess
- Is independent of the concentration of reactants
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The Correct Option is C
Solution and Explanation
The value of the rate constant of pseudo-first-order reaction depends on the concentration of reactants present in excess amount. A pseudo-first-order reaction can be defined as a second-order or bimolecular reaction that is made to behave like a first-order reaction. This reaction occurs when one reacting material is present in great excess or is maintained at a constant concentration compared with the other substance.
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Concepts Used:
Rate of a Chemical Reaction
The rate of a chemical reaction is defined as the change in concentration of any one of the reactants or products per unit time.
Consider the reaction A → B,
Rate of the reaction is given by,
Rate = −d[A]/ dt=+d[B]/ dt
Where, [A] → concentration of reactant A
[B] → concentration of product B
(-) A negative sign indicates a decrease in the concentration of A with time.
(+) A positive sign indicates an increase in the concentration of B with time.
Factors Determining the Rate of a Reaction:
There are certain factors that determine the rate of a reaction:
- Temperature
- Catalyst
- Reactant Concentration
- Chemical nature of Reactant
- Reactant Subdivision rate