solving for rates with charts

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KarlaArevalo2F
Posts: 67
Joined: Tue Nov 14, 2017 3:01 am
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solving for rates with charts

Postby KarlaArevalo2F » Sun Mar 10, 2019 7:21 pm

What is the best way to approach problems asking to solve for rates and orders given a chart?

Lexie Baughman 2C
Posts: 30
Joined: Sat Oct 06, 2018 12:16 am

Re: solving for rates with charts

Postby Lexie Baughman 2C » Sun Mar 10, 2019 7:29 pm

So, your rate law will be k = [A]^n x [B]^m.
When given a chart, you have to look at two cases: one where [A] is changing but [B] is constant, and one where [B] is changing and [A] is constant.
For whichever concentration is changing, use this formula - rate(2)/rate(1) = ([A(2)]/[A(1)])^n - with values from the table.
This will solve for n, the exponent and order of reactant A, and you can do the same process for reactant B.

Lexie Baughman 2C
Posts: 30
Joined: Sat Oct 06, 2018 12:16 am

Re: solving for rates with charts

Postby Lexie Baughman 2C » Sun Mar 10, 2019 7:30 pm

And, once you solve for the reactant orders, you can solve for the rate constant by choosing a set of values from the table and plugging them in. Once you have the rate constant, you can plug in concentrations given from the table and the rate constant you solved for to find an unknown rate of a reaction.

KarlaArevalo2F
Posts: 67
Joined: Tue Nov 14, 2017 3:01 am
Been upvoted: 1 time

Re: solving for rates with charts

Postby KarlaArevalo2F » Mon Mar 11, 2019 8:05 pm

Ahhh!! thank you so much! I kept reading other explanations but yours was much clearer!


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