Finding rate constant

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Diviya Khullar 1G
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

Finding rate constant

Postby Diviya Khullar 1G » Wed Mar 13, 2019 10:33 pm

How do you find the rate constant for the following first-order reaction;
, given mol L-1 and that after 115s the concentration of B rises to 0.034 mol L-1.

varunhariharan
Posts: 30
Joined: Mon Jan 07, 2019 8:16 am

Re: Finding rate constant

Postby varunhariharan » Thu Mar 14, 2019 10:43 am

The production of B is half the rate of the disappearance of A. With stoichiometry from there, the concentration of A must have decreased by 2(0.034 M) = 0.068M. This should be subtracted from the initial concentration of A to determine the concentration after 115s. Then ln([A]/[A0])=-kt should be used to determine k.

Claudia Luong 4K
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: Finding rate constant

Postby Claudia Luong 4K » Sun Mar 17, 2019 10:50 am

We can use the straight line formula for first-order reactions.


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