## enzyme/catalyst scenarios

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

Sue Bin Park 2I
Posts: 52
Joined: Mon Jun 17, 2019 7:24 am

### enzyme/catalyst scenarios

one of the examples/scenarios given by prof. lavelle of a 0th order rxn was in the case of a catalysed reaction, in which the catalyst is always saturated by reactant particles and the rate is dependent on the availability of catalyst rather than concentration of reactants.

my question is, is there a range of concentrations of R in which the catalyst is not saturated, and increasing [R] would initially change rate of reaction? say if you have a catalyst with a really large surface area and you start with a really dilute solution.

Sue Bin Park 2I
Posts: 52
Joined: Mon Jun 17, 2019 7:24 am

### Re: enzyme/catalyst scenarios

and i guess to extend the question, would there be cases in which scenarios change enough to change rate equations describing the current state of the system?

Juliana Chopelas 1A
Posts: 50
Joined: Sat Aug 24, 2019 12:16 am

### Re: enzyme/catalyst scenarios

I am not sure if there is a time where catalysts are not saturated or the range of concentrations of the reactants for this but I do know that a zero order reaction is the only reaction whose rate is influenced by the how saturated a catalyst is.