Occurrence of Zero Order Reactions

[Arezo Ahmadi 3J]

When do zero order reactions occur mathematically? Is that saying that the exponents that are associated with concentrations are all 0 and thus the concentrations of reactants do not affect the rate law? Or what is the meaning of a zero order reaction?

[Nika Gladkov 1A]

Zero order reactions are reactions whose rate does not depend on the concentrations of the reactants at any point. Their rate laws would be written as: rate= k[R]^0, which is just rate = k.

[EnricoArambulo3H]

Zero order reactions occur when the rate of the reaction is independent of the concentration of the reactants. I believe that in this case your integrated rate law would end up being something like rate=-kt, and the rate of the reaction would only change with time. I hope this helped!

[Cora Chun 2D]

Zeroth order occurs when rate=k*[A]^0. Because the reactant is to the power of zero, it is just 1. This would like like r=k*1, or r=k. In short, in a zeroth order reaction, the concentration of reactant does not affect the rate. Hope this helps!

[shevanti_kumar_1E]

A zero order reaction means that the rate of the reaction is independent of concentration of the reactants. Zero-order reactions generally occur when more than 2 reactants are involved and the concentrations of some are significantly greater than those of others. It is also common when a reaction is catalyzed by attachment to a solid surface or enzyme.

[Kimiya Aframian IB]

When do zero order reactions occur mathematically? Is that saying that the exponents that are associated with concentrations are all 0 and thus the concentrations of reactants do not affect the rate law? Or what is the meaning of a zero order reaction?

Hi! I think the meaning of zeroth order is exactly what you said conceptually in terms of the concentration not affecting the rate law and it being dependent on time instead. Mathematically, it would be presented with an exponent of 0. Hope this helps!

[Olivia Smith 2E]

Zero order reactions are when the concentrations have no affect on the rate of the reaction. It will be constant throughout

[Devin Patel 2D]

In terms of mathematics, the zeroeth rate law is essentially Rate = k. This is because the exponent correlated to the concentration of the reactant in the rate law, Rate = k[A]^n, would be zero and [A]^0 = 1. On a graph of [A] vs time, there would also be a straight line with a negative slope if it is a zero-order reaction.

[Madison Muggeo 3H]

Hi! I think Lavelle mentioned that 0 order reactions weren't uncommon, but not as prevalent as 1st/2nd. It basically means that a change in the concentration will not affect the rate of the reaction. Hope this helps!

[Jordan Tatang 3L]

if we put the concentrations to the power of 0 we get 1 so we're left with k. As everyone else says, that means that the rate law is independent of the concentration of the reactants.

[Alisa Nagashima 1B]

As for visualizing the graphs, if you plot the concentration of reactant vs time, you should get a straight line if it's a zero order reaction.

[Ximeng Guo 2K]

To add on, the unit of k for zero order is M/s.

[MariaCassol1L]

Zero-order reactions happen normally when you have a catalyst (e.g enzymes) that can facilitate the reaction, which means that once your catalyst is saturated no matter how much you increase your reactant concentration the rate will be the same. So yes, mathematically, the reactant concentration does not affect the rate of the reaction so rate=k[A]^0 and since [A]^0 =1, the concentration does not affect the rate.

[Shreyank Kadadi 3K]

A zero order reaction simply refers to a reaction where the rate is completely independent of the concentration of the reactants. Mathematically, rate = k*[A]^0 = k (this shows that the rate of the reaction is dependent on the rate constant and not the concentration of the reactant A).