## Deriving these equations

$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$

Miriam Sheetz 2B
Posts: 64
Joined: Fri Sep 28, 2018 12:25 am

### Deriving these equations

Do we have to know how to derive the equations for first order reactions? Or just understand the concept/how to do calculations.

Searra Harding 4I
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

### Re: Deriving these equations

I believe you're okay just knowing the concept and applying it but being able to derive it could give you a better understanding.

Fayez Kanj
Posts: 62
Joined: Fri Sep 28, 2018 12:18 am
Been upvoted: 1 time

### Re: Deriving these equations

Hello!

Dr Lavelle derived the equations so that we could have a better understanding of why there are true and where they come from, rather than just giving it to us. However, for the exam, you could just memorize them and use them as is.

Hope this helps :)