## 2016 Winter Workbook pg. 36 #10

$\frac{d[R]}{dt}=-k[R]^{2}; \frac{1}{[R]}=kt + \frac{1}{[R]_{0}}; t_{\frac{1}{2}}=\frac{1}{k[R]_{0}}$

HoganFenster2E
Posts: 23
Joined: Fri Sep 25, 2015 3:00 am

### 2016 Winter Workbook pg. 36 #10

For the problem:
Consider the reaction A+B-->C+D rate=k[A]squared
The time it takes for [A] to decrease from 1.0 to 0.50M is the same as the time it takes [A] to decrease from 0.50 to 0.25M. True or false?

Why is this false?

PriyaKohli3B
Posts: 31
Joined: Fri Sep 25, 2015 3:00 am

### Re: 2016 Winter Workbook pg. 36 #10

Because it is second order so if you use the equation 1/[a]=kt+1/[a0] you will see that 1-1/.5 is not the same as 1/.5-1/.25.