initial concentration


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Briana Yik 1H
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

initial concentration

Postby Briana Yik 1H » Fri Mar 08, 2019 12:15 am

Why do zero order reactions not depend on the initial concentrations?

Melissa Bu 1B
Posts: 36
Joined: Fri Sep 28, 2018 12:19 am

Re: initial concentration

Postby Melissa Bu 1B » Fri Mar 08, 2019 12:17 am

The characteristic of zero order reactions is that they occur at a rate that is independent of the initial concentration. No matter how much of a reactant you have initially, the reaction will proceed at the same rate (that of the rate constant, k).

Dimitri Speron 1C
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Joined: Fri Sep 28, 2018 12:17 am
Been upvoted: 1 time

Re: initial concentration

Postby Dimitri Speron 1C » Fri Mar 08, 2019 10:01 am

This can be for a number of reasons. The one that Lavelle specifically mentioned in class is that the reaction is dependent on an enzyme or catalyst rather than on the concentration of reactants.

Jason Ye 2I
Posts: 33
Joined: Fri Sep 28, 2018 12:22 am

Re: initial concentration

Postby Jason Ye 2I » Fri Mar 08, 2019 2:19 pm

The reactant concentrations just dont affect rate.

MadelynNguyen1F
Posts: 59
Joined: Fri Apr 06, 2018 11:04 am

Re: initial concentration

Postby MadelynNguyen1F » Fri Mar 08, 2019 3:43 pm

I found this answer online, "Zero-order reactions are typically found when a material that is required for the reaction to proceed, such as a surface or a catalyst, is saturated by the reactants".

Madeline Motamedi 4I
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: initial concentration

Postby Madeline Motamedi 4I » Fri Mar 08, 2019 10:06 pm

Mathematically since you multiply k by the concentration of your reactant and the exponent is 0, this term doesn't affect the final answer.

Karina Jiayu Xu 4E
Posts: 58
Joined: Fri Sep 28, 2018 12:29 am

Re: initial concentration

Postby Karina Jiayu Xu 4E » Sat Mar 09, 2019 5:26 pm

so is it okay to assume infinite concentration of initial reactants?


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