Endgame 15b


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chari_maya 3B
Posts: 108
Joined: Sat Sep 07, 2019 12:18 am

Endgame 15b

Postby chari_maya 3B » Sat Mar 14, 2020 6:51 pm

Can someone explain question 15b on Endgame?

The lab finds that with these conditions, yield a pseudo rate constant k'. Show how k' is related to the real overall rate constant k.

I am a little confused what the significance of a pseudo rate constant is. I also just don't understand the solution given.

TanveerDhaliwal3G
Posts: 105
Joined: Fri Aug 30, 2019 12:17 am

Re: Endgame 15b

Postby TanveerDhaliwal3G » Sat Mar 14, 2020 7:18 pm

I think the k' is supposed to signify the combination of the first rate constant and the concentration of A

Emily Burghart 1k
Posts: 50
Joined: Wed Sep 18, 2019 12:17 am

Re: Endgame 15b

Postby Emily Burghart 1k » Sat Mar 14, 2020 8:07 pm

TanveerDhaliwal3G wrote:I think the k' is supposed to signify the combination of the first rate constant and the concentration of A


How did you get that from the problem? Is there a simple way of figuring that out?

CNourian2H
Posts: 106
Joined: Fri Aug 30, 2019 12:16 am

Re: Endgame 15b

Postby CNourian2H » Sat Mar 14, 2020 9:55 pm

Ya I dont understand how to get it directly.

CNourian2H
Posts: 106
Joined: Fri Aug 30, 2019 12:16 am

Re: Endgame 15b

Postby CNourian2H » Sat Mar 14, 2020 9:57 pm

Oh i guess pseudo rate constant k' is just using the reactant concentration that the rate is dependent on. that would be [B].

Jessica Chen 2C
Posts: 103
Joined: Thu Jul 11, 2019 12:17 am

Re: Endgame 15b

Postby Jessica Chen 2C » Sat Mar 14, 2020 10:39 pm

Yeah I guess the pseudo rate constant allows us to focus on seeing how one specific reactant’s concentration affects rate. By making the concentration of A super high, it’s essentially not changing as the reaction proceeds, and thus we can include it in k’.


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