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### Initial Rate

Posted: Sat Mar 14, 2020 4:24 pm
When finding the initial rate or initial concentrations, is it possible that there'll be a case where you won't have constant initial concentrations to figure out each of the order of reactants? I think I came across this scenario once, so how would you approach the problem? This applies to problems where you are given a chart of the experiment #, the initial concentrations, and the initial rates in figuring out the k at any concentration-

### Re: Initial Rate

Posted: Sat Mar 14, 2020 5:32 pm
i think they would have to give you one experiment where the concentration is held constant and then if both change in a different one you would first find the change from the one you already know and then find the change from the other change in concentration.

### Re: Initial Rate

Posted: Sat Mar 14, 2020 5:35 pm
They should give something that remains constant because that is the method being employed.

### Re: Initial Rate

Posted: Sat Mar 14, 2020 5:44 pm
The concentration of one substance has to be constant for you to determine the rate of the other substance whose concentration is changing at different times in the reaction.

### Re: Initial Rate

Posted: Sat Mar 14, 2020 9:47 pm
They will only change the concentration of one substance from trial to trial

### Re: Initial Rate

Posted: Sun Mar 15, 2020 6:39 am
Where did you come across this problem? perhaps there was something else given that you looked over