Advertisements
Advertisements
Question
Define the half-life of a first-order reaction.
Advertisements
Solution
The time in which concentration of reactant becomes half of its initial concentration is called half Life. It is denoted by `t_(1/2)`.
APPEARS IN
RELATED QUESTIONS
Answer the following in one or two sentences.
What are the units for rate constants for zero-order and second-order reactions if time is expressed in seconds and concentration of reactants in mol/L?
Derive the integrated rate law for the zeroth order reaction.
For a first order reaction \[\ce{A ->Product}\] with initial concentration x mol L−1, has a half life period of 2.5 hours. For the same reaction with initial concentration `("x"/2)` mol L−1 the half life is
The decomposition of phosphine (PH3) on tungsten at low pressure is a first-order reaction. It is because the
If 75% of a first order reaction was completed in 60 minutes, 50% of the same reaction under the same conditions would be completed in ____________.
Describe the graphical representation of first order reaction.
Write the rate law for the following reaction.
A reaction that is second order in NO and first order in Br2.
The following reactions follow zero order kinetics, EXCEPT ____________.
How long would it take to electroplate a spoon with 0.1 mol of silver (108 g/mol) at a constant current of 2.0 A using AgNO3?
For first order reaction the concentration of reactant decreases from 0.2 to 0.1 M in 100 minutes. What is the rate constant of the reaction?
A first order reaction is 25% completed in 40 minutes. What is the rate constant k tor the reaction?
The time of completion of 90% of a first order reaction is approximately ____________.
The rate constant of a reaction has same units as the rate of reaction. The reaction is of ____________.
A first order reaction completes its 10% in 20 minutes, then the time required to complete its 19% is ____________.
In a first order reaction, the concentration of the reactant is reduced to 25% in one hour. The half-life period of the reaction is ____________.
A first order reaction is 75% completed in 60 minutes, the time required for it's 50% completion is ____________.
The slope of a graph, log [A]t versus 't' for a first order reaction is −2.5 × 10−3 s−1. The rate constant for the reaction is ____________.
The time taken for 80% of a first order reaction to be complete is approximately ____________.
Which among the following is an example of zero order reaction?
The time required to decompose SO2Cl2 to half of it's initial amount is 60 minutes. Calculate rate constant for this first order reaction.
A first order reaction, A → B takes 100 minutes for it's 90% completion. What is the rate constant of reaction?
If the rate constant for a first-order reaction is k, the time (t) required for the completion of 99% of the reaction is given by:
Which among the following reactions is an example of pseudo first order reaction?
The rate constant for a first order reaction is 7.0 × 10-4 s-1. If initial concentration of reactant is 0.080 M, what is the half-life of reaction?
Which of the following correctly represents integrated rate law equation for a first order reaction in a gas phase?
What are integrated rate laws?
