determining k

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Julia Holsinger_1A
Posts: 50
Joined: Tue Feb 26, 2019 12:16 am

determining k

Postby Julia Holsinger_1A » Thu Mar 12, 2020 12:12 pm

when trying to determine k, can you use any trial (when looking at multiple trials)?

Tanmay Singhal 1H
Posts: 143
Joined: Sat Jul 20, 2019 12:16 am

Re: determining k

Postby Tanmay Singhal 1H » Thu Mar 12, 2020 12:12 pm

yes you can use any

Brianna Becerra 1B
Posts: 117
Joined: Fri Aug 02, 2019 12:16 am

Re: determining k

Postby Brianna Becerra 1B » Thu Mar 12, 2020 12:13 pm

I assume by trials, you mean the problems that have different experiment charts. For a problem like this, you can use any of them as long as all of the information can be filled in except k.

Ruby Tang 2J
Posts: 102
Joined: Fri Aug 30, 2019 12:15 am

Re: determining k

Postby Ruby Tang 2J » Thu Mar 12, 2020 12:14 pm

Yeah, you just need to make sure that the concentration is the same for every other reactant than the one you're looking at. For example, in a reaction with reactants A, B, and C, if you're trying to figure out how [A] affects the rate of the reaction, you should compare two trials where [B] is the same AND [C] is the same.

Sydney Pell 2E
Posts: 100
Joined: Wed Sep 11, 2019 12:17 am

Re: determining k

Postby Sydney Pell 2E » Thu Mar 12, 2020 2:00 pm

As long as you have the corresponding reaction rate and the concentrations of the reactants/products, you can use any trial to determine k.

Celine 1F
Posts: 120
Joined: Fri Aug 02, 2019 12:16 am

Re: determining k

Postby Celine 1F » Thu Mar 12, 2020 2:03 pm

Yes you can use any trial to find K

Jacob Motawakel
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Joined: Wed Sep 18, 2019 12:20 am
Been upvoted: 1 time

Re: determining k

Postby Jacob Motawakel » Thu Mar 12, 2020 2:05 pm

yes you can use any one trial

janice
Posts: 34
Joined: Mon Jan 09, 2023 9:42 am

Re: determining k

Postby janice » Fri Mar 03, 2023 3:24 am

To determine k, you can use any trial but the same set of data in the equation rate = k [A]^x [B]^y, x and y being the order of the reactants.

Caleb Kim 1K
Posts: 67
Joined: Mon Jan 09, 2023 8:38 am

Re: determining k

Postby Caleb Kim 1K » Fri Mar 03, 2023 11:14 am

When determining K, you are allowed to use any trial as long as you know the rates of each concentration. Once you figure out the exponents of the reactant concentrations, you are allowed to use any trial to plug in the concentrations and rate of the trail to find the rate constant.

Caleb Kim 1K
Posts: 67
Joined: Mon Jan 09, 2023 8:38 am

Re: determining k

Postby Caleb Kim 1K » Fri Mar 03, 2023 11:17 am

When determining K, you are allowed to use any trial as long as you know the orders of each concentration. Once you figure out the exponents of the reactant concentrations (respective order), you are allowed to use any trial to plug in the concentrations and rate of the trail to find the rate constant.

Ethan Liang 1A
Posts: 38
Joined: Mon Jan 09, 2023 2:19 am

Re: determining k

Postby Ethan Liang 1A » Fri Mar 03, 2023 11:19 am

Professor Lavelle also said that when doing laboratory work, it's good practice to find the k's from all the trials and average them because of experimental error. However, in a textbook problem, it's safe to assume that all the k values from each trial will be the same.

Alyson Chou 3H
Posts: 35
Joined: Mon Jan 09, 2023 10:07 am

Re: determining k

Postby Alyson Chou 3H » Fri Mar 03, 2023 1:00 pm

Yes, you may use any trial to plug in the rate and concentration for each substance AFTER determining the rate law equation (rate=k[A]^n[B]^m)

yuyi_section3a
Posts: 25
Joined: Mon Jan 09, 2023 9:39 am

Re: determining k

Postby yuyi_section3a » Fri Mar 03, 2023 3:36 pm

Yes, you can use any trial to determine k but the exponents must be correct to the reactants concentrations at there respective order.

Niyati 1F
Posts: 90
Joined: Fri Sep 24, 2021 7:04 am

Re: determining k

Postby Niyati 1F » Mon Mar 06, 2023 12:06 pm

When determining k, you can choose any trial to plug in values as long as the same trial's data is used for all values in the equation.


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