(A) For a zero-order reaction,the integrated rate equation is: $[A] = [A]_0 - kt$. Given: Rate constant $k = 0.2 \ mol \ m^{-3} \ h^{-1}$. Time $t = 3

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(A) For a zero-order reaction,the integrated rate equation is: $[A] = [A]_0 - kt$. Given: Rate constant $k = 0.2 \ mol \ m^{-3} \ h^{-1}$. Time $t = 30 \ minutes = 0.5 \ h$. Concentration at time $t$,$[A] = 0.05 \ mol \ m^{-3}$. Substituting the values into the equation: $0.05 = [A]_0 - (0.2 \times 0.5)$ $0.05 = [A]_0 - 0.1$ $[A]_0 = 0.05 + 0.1 = 0.15 \ mol \ m^{-3}$.

Class 12 Chemistry Chemical Kinetics Zero order reaction

Medium

The rate constant of a zero-order reaction is $0.2 \ mol \ m^{-3} \ h^{-1}$. If the concentration of the reactant after $30 \ minutes$ is $0.05 \ mol \ m^{-3}$,then its initial concentration will be ....... $mol \ m^{-3}$.

A
$0.15$
B
$1.05$
C
$0.25$
D
$4.00$

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Zero order reaction

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The rate constant of a zero-order reaction is $0.2 \ mol \ m^{-3} \ h^{-1}$. If the concentration of the reactant after $30 \ minutes$ is $0.05 \ mol \ m^{-3}$,then its initial concentration will be ....... $mol \ m^{-3}$.

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