units of k


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Karina Kong 2H
Posts: 98
Joined: Thu Jul 25, 2019 12:16 am

units of k

Postby Karina Kong 2H » Sat Mar 14, 2020 5:16 pm

Could someone explain why there are different units for each order?

Jiyoon_Hwang_2I
Posts: 101
Joined: Sat Sep 14, 2019 12:17 am

Re: units of k

Postby Jiyoon_Hwang_2I » Sat Mar 14, 2020 5:22 pm

Its because some of the concentrations are squared or cubed so the units are also squared/cubed

AronCainBayot2K
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Re: units of k

Postby AronCainBayot2K » Sat Mar 14, 2020 5:39 pm

There are different units of k due to the powers involved in concentrations. Units could be more than the power of 1 which would change the unit of k.

TarynD_1I
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: units of k

Postby TarynD_1I » Sat Mar 14, 2020 5:39 pm

https://users.stlcc.edu/gkrishnan/rateunits.htm
here is a helpful link to organize which units go with each order of reaction!

Maya Gollamudi 1G
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Re: units of k

Postby Maya Gollamudi 1G » Sat Mar 14, 2020 7:17 pm

Depending on the order of each reactant, certain concentrations may be squared, which makes the unit M^2, affecting k.

005206171
Posts: 107
Joined: Wed Sep 18, 2019 12:20 am

Re: units of k

Postby 005206171 » Sat Mar 14, 2020 7:33 pm

When you have reactions of different orders, you end up getting mol^n/L^n on the side of k. Since The rate is always mol/Ls, the kr for different orders will change to always cancel out and get mol/Ls for the units of the final answer/rate.


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