Periodic Table Question 2 of 3 Incorrect Incorrect Incorrect Incorrect Incorrect

Question

Periodic Table Question 2 of 3 Incorrect Incorrect Incorrect Incorrect Incorrect Sapling Learning For A products, time and concentration data were collected and plotted as shown here. [A] (M) t (s) 0.550 0.0 [A] 0.301 30.0 In[A] 0.208 60.0 0.158 90.0 Determine the reaction order, the rate constant, and the units of the rate constant. Number Units Number order 2 There is a hint available! View the hint by clicking on the bottom divider bar on divider bar again to hide the hint. Previous Give up & view solution Check Answer ONext SExt

Explanation / Answer

Second order rate constant integrated equation is,

1/[A]t = kt + 1/[A]0

Similar to y = mx + c

So, graph between 1/[A]t vs t gives the straight line with positive slope. (3rd graph)

Hence the reaction is second order.

Form the formula,

at, 30.0s

1 / (0.301) = k (30.0) + 1/(0.550)

3.32 = 30.0 k + 1.82

30.0 k = 1.50

k = 0.0500 M-1s-1

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