## All reactants zero order?

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

Leonardo Le Merle 1D
Posts: 56
Joined: Wed Feb 27, 2019 12:16 am

### All reactants zero order?

Could there ever be a reaction in which all reactants are zero order and thus the reaction itself is zeroth order? What would be an example of this?

JohnWalkiewicz2J
Posts: 103
Joined: Thu Jul 11, 2019 12:17 am
Been upvoted: 1 time

### Re: All reactants zero order?

I mean, I don't see a scenario where it couldn't be possible. . but yeah just know that these type of reactions are typically found when a material that is required for a reaction to proceed-surface/catalyst-is saturated by the reactants. Hope this helps! :D

Tanmay Singhal 1H
Posts: 143
Joined: Sat Jul 20, 2019 12:16 am

### Re: All reactants zero order?

very rare but yes it can occur

Michelle Song 1I
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

### Re: All reactants zero order?

Yes, it could happen if they all depend on the presence of a catalyst.

KBELTRAMI_1E
Posts: 108
Joined: Sat Jul 20, 2019 12:17 am

### Re: All reactants zero order?

Michelle Song 1I wrote:Yes, it could happen if they all depend on the presence of a catalyst.

How so?

KBELTRAMI_1E
Posts: 108
Joined: Sat Jul 20, 2019 12:17 am

### Re: All reactants zero order?

Leonardo Le Merle 1D wrote:Could there ever be a reaction in which all reactants are zero order and thus the reaction itself is zeroth order? What would be an example of this?

quoting in case an example comes up

Posts: 52
Joined: Thu Jul 11, 2019 12:16 am

### Re: All reactants zero order?

If the catalyst was saturated with just reactants, then the catalyst would be the main driving force of the reaction and it would only be dependent on reaction rate, or k, in a zeroth order reaction. This would be possible in a real life reaction if the catalyst was saturated completely and the concentration of the reactants was meaningless.