In a pseudo first order reaction in water,the following results were obtained:
$t / s$ $0$ $30$ $60$ $90$ $[A] / mol \ L^{-1}$ $0.55$ $0.31$ $0.17$ $0.085$
Calculate the average rate of reaction between the time interval $30$ to $60 \ s$.
| $t / s$ | $0$ | $30$ | $60$ | $90$ |
| $[A] / mol \ L^{-1}$ | $0.55$ | $0.31$ | $0.17$ | $0.085$ |
Calculate the average rate of reaction between the time interval $30$ to $60 \ s$.
(A) The average rate of reaction between the time interval $30 \ s$ to $60 \ s$ is given by the formula:
$\text{Average rate} = -\frac{\Delta [A]}{\Delta t}$
$= -\frac{[A]_{60} - [A]_{30}}{60 - 30}$
$= -\frac{0.17 - 0.31}{30}$
$= -\frac{-0.14}{30}$
$= 4.67 \times 10^{-3} \ mol \ L^{-1} \ s^{-1}$
$\text{Average rate} = -\frac{\Delta [A]}{\Delta t}$
$= -\frac{[A]_{60} - [A]_{30}}{60 - 30}$
$= -\frac{0.17 - 0.31}{30}$
$= -\frac{-0.14}{30}$
$= 4.67 \times 10^{-3} \ mol \ L^{-1} \ s^{-1}$
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