## Reaction Rate

$aR \to bP, Rate = -\frac{1}{a} \frac{d[R]}{dt} = \frac{1}{b}\frac{d[P]}{dt}$

Andy Liao 1B
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

### Reaction Rate

I was wondering what the statement "the reaction rate only depends on [R], the concentration of the reactant" means. Can someone please explain? I thought the reaction rate also depends on factors such as the rate constant k and the activation energy.

Maria Bajenov 1I
Posts: 28
Joined: Fri Sep 29, 2017 7:06 am

### Re: Reaction Rate

I think it means to only look at reactants at the start of the reaction (initial rate). Why does the reaction rate depend only on concentration of reactants, but the reaction rate can be set equal to products as well? How is it allowed to just focus on initial rate of reactants?

Nhan Nguyen 2F
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am
Been upvoted: 1 time

### Re: Reaction Rate

The reaction rate depends only on concentration of reactants because the initial rate is the maximum rate where few products are being produced (it's easier to study only the forward/irreversible reaction)
Also note that the rate of reaction depends on: constant k, concentration of Reactants, and order of Reactants.

Michelle Lee 2E
Posts: 64
Joined: Thu Jul 27, 2017 3:01 am

### Re: Reaction Rate

Since we're only focusing on the initial rate when we're thinking of kinetics, this is where little to no product has been formed. With such little product, finding the maximum rate possible is difficult (even though we're given the rate equation through product concentration.