7A.17

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AlyssaYeh_1B
Posts: 100
Joined: Sat Aug 17, 2019 12:16 am

7A.17

Postby AlyssaYeh_1B » Tue Mar 10, 2020 3:56 pm

The question provides a table of values, with which we can work out the rate = kr[A][B]2[C]2 (overall order of 5). When I calculate kr, I get the answer 2.85 L4*mmol-4*s-1. When I calculate the rate with that k, [A] = 3.01 mmol/L, [B] = 1.00 mmol/L, and [C] = 1.15 mmol/L, I get rate = 11.3 mmol*L-1*s-1. However, the answer provided by the book for kr is 2.85 x 1012 L4*mmol4*s-1. Where did the 1012 come from? How come the units don't work out? The book then says the rate = 1.13 x 10-2 mmol*L-1*s-1. What did I do wrong in my calculation?

Alicia Lin 2F
Posts: 83
Joined: Wed Sep 18, 2019 12:17 am

Re: 7A.17

Postby Alicia Lin 2F » Tue Mar 10, 2020 8:08 pm

The book converts mmol to mol and work with these units throughout the entire problem. If you convert to mol from the beginning and work with these values throughout, you should get the same answer.

Anisha Chandra 1K
Posts: 118
Joined: Thu Jul 11, 2019 12:17 am

Re: 7A.17

Postby Anisha Chandra 1K » Fri Mar 13, 2020 7:30 am

Make sure to convert from mmol to mol before getting the final answer in mmol.


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