## units of K

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

hanna_maillard3B
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

### units of K

what are the units of k for a second order reaction ?

MichelleRamirez_2F
Posts: 63
Joined: Fri Sep 28, 2018 12:28 am

### Re: units of K

For a second order reaction k is Lx mol^-1x s^-1.

He whose name cannot be spoken
Posts: 20
Joined: Sat Apr 28, 2018 3:00 am

### Re: units of K

The best way to go about knowing the units of K is knowing how to find them.
Rate should be expressed in m/l*s, so you can write out the units of the reactants and figure it out
for a second order reaction, you would have $\frac{m*m}{l*l}*k\Rightarrow \frac{m*m}{l*l}*\frac{l}{m*s}\Rightarrow \frac{m}{l*s}$

sallina_yehdego 2E
Posts: 75
Joined: Sun Apr 29, 2018 3:00 am

### Re: units of K

The units for k in a second order reaction is M^-1s^-1