## Shortcut

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

Juanalv326
Posts: 49
Joined: Fri Sep 29, 2017 7:04 am

### Shortcut

What is a shortcut we can remember on finding out what the units for k would be.

Samira 2B
Posts: 38
Joined: Fri Sep 29, 2017 7:05 am

### Re: Shortcut

If it is 0th order, then it would just be M/s.
For 1st order, it would just be 1/s.
For 2nd order, it would just be M^-1/s.

So, the shortcut is to subtract the exponent of M (1) by the order that the reaction is.