## 15.35

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

Posts: 59
Joined: Fri Sep 29, 2017 7:07 am

### 15.35

How would you find k in this equation? I don't understand where the solution manual got the equation they used

Thu Uyen Tran 1B
Posts: 31
Joined: Fri Sep 29, 2017 7:05 am

### Re: 15.35

The equation is derived from A=k[A]2, shown in section 15.6 (page 630) of the textbook.

LMendoza 2I
Posts: 41
Joined: Sat Jul 22, 2017 3:00 am

### Re: 15.35

You can also use the half life equation for a second-order reaction (t1/2=1/k[A]0) and rearrange it so that you can get k (k=1/[A]0*t1/2).