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  • Calculate the half life and completion time, respectively of a zero order reaction: <img alt="\mathrm{A \rightarrow B+C}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7B

Calculate the half life and completion time, respectively of a zero order reaction:

\mathrm{A \rightarrow B+C}

If concentration of A initially and after 15 min is 0.5 M and 0.015 M, respectively

Option: 1

10,20


Option: 2

25,50


Option: 3

2 \times 10^{-3}, 4 \times 10^{-3}


Option: 4

7.73,15.47


Answers (1)

For zero order reaction, 

\mathrm{\begin{aligned} & A_t=A_0-k t \\ & +k=\frac{A_0-A_t}{t} \\ k & =\frac{0.5-0.015}{15} \\ & =0.0323 \end{aligned}}

\mathrm{\begin{aligned} t_{1 / 2}=\frac{A_0}{2 k} & =\frac{0.5}{2 \times 0.0323} \\ & =7.73 \mathrm{~min} \\ t_{100%}=\frac{c_0}{k} & =\frac{0.5}{0.0323}=15.47 \mathrm{~mm} \end{aligned}}

Posted by

Ramraj Saini

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