Advertisements
Advertisements
Question
Answer the following in one or two sentences.
Write the relationships between rate constant and half-life of the first order and zeroth-order reactions.
Advertisements
Solution
i. First-order reaction: `"t"_(1/2) = 0.693/"k"`
ii. Zero order reaction: `"t"_(1/2) = [["A"_0]]/(2"k")`
APPEARS IN
RELATED QUESTIONS
Answer the following in brief.
Obtain the relationship between the rate constant and half-life of a first-order reaction.
Answer the following in brief.
What are the units of the rate constant?
Derive the integrated rate law for the zeroth order reaction.
Rate constant of a reaction is 3.6 × 10–3 s–1. The order of reaction is ______.
What is half life of first order reaction if time required to decrease concentration of reactants from 0.8 M to 0.2 M is 12 hours?
The rate constant of the first order reaction is 1.386 min–1. Calculate the time required for 80% reactant to decompose?
For a first-order reaction, the rate constant is 6.909 min−1 the time taken for 75% conversion in minutes is
In a first order reaction \[\ce{x -> y}\]; if k is the rate constant and the initial concentration of the reactant x is 0.1 M, then, the half life is
Describe the graphical representation of first order reaction.
Give two examples for zero order reaction.
The time for half change in a first order decomposition of a substance A is 60 seconds. Calculate the rate constant. How much of A will be left after 180 seconds?
Which among the following reaction is an example of a zero order reaction?
In a first order reaction, the concentration of the reactant, decreases from 0.8 mol dm−3 to 0.4 mol dm−3 in 15 minutes. The time taken for the concentration to change from 0.1 mol dm−3 to 0.025 mol dm−3 is ____________.
If time required to decrease concentration of reactant from 0.8 M to 0.2 M is 12 hours, the half life of this first order reaction is ____________.
For the first order reaction, plot of log10 [A]t against time 't' is a straight line with a negative slope equal to ____________.
The rate and the rate constants of the reaction, \[\ce{A + 2B -> C + D}\] are 8 × 10−3 mol dm−3 s−1 and 2 × 10−3 s−1 respectively. The concentrations of A and B are 4 mol dm−3 each. The overall order of the reaction is ____________.
The order of the reaction for which the unit of rate constant is s−1 is ____________.
The half-life of a first order reaction is 6.0 hour. How long will it take for the concentration of reactant to decrease from 0.4 M to 0.12 M?
Which among the following is an example of pseudo first order reaction?
A first order reaction takes 40 minutes for 30% completion. Calculate the half-life of reaction.
For the first order reaction A → B, the rate constant is 0.25 s-1, if the concentration of A is reduced to half, the value of rate constant will be ________.
Rate constant for zero order reaction is 2 × 10-2 mol L-1 s-1. If the concentration of the reactant after 25 sec. is 0.5 M, what is the initial concentration of reactant?
The integrated rate equation is Rt = log C0 – log Ct, then the straight-line graph is obtained by plotting.
Which one of the following reactions is a true first-order 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:
What is the rate constant of a first order reaction if 0.08 mole of reactant reduces to 0.02 mole in 23.03 minutes?
The half-life period for the first order reaction is 1.7 hrs. How long will it take for 20% of the reactant to disappear?
A first order reaction takes 10 minute for 30% completion. Find rate constant of the reaction.
