Calculating K

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Philip
Posts: 100
Joined: Sat Sep 07, 2019 12:16 am

Calculating K

Postby Philip » Mon Mar 09, 2020 11:15 am

When calculating K, why are there no units

Abhi Vempati 2H
Posts: 104
Joined: Fri Aug 09, 2019 12:17 am

Re: Calculating K

Postby Abhi Vempati 2H » Mon Mar 09, 2020 11:17 am

K is actually measured by the activities of all the reactants, which have no units. Using concentrations is technically an approximation technique, and in order to account for this, we remove the units. This was covered in one of the equilibrium video lectures on his website. Hope this helps!

805422680
Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

Re: Calculating K

Postby 805422680 » Mon Mar 09, 2020 11:27 am

K is a ratio of products to reactants. Ratios do not have units

Maria Poblete 2C
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

Re: Calculating K

Postby Maria Poblete 2C » Mon Mar 09, 2020 11:33 am

K is a constant, and when calculating K, the units of molarity or partial pressure actually cancel out.

Philip
Posts: 100
Joined: Sat Sep 07, 2019 12:16 am

Re: Calculating K

Postby Philip » Mon Mar 09, 2020 7:13 pm

How does sig figs factor in calculating K then?

WGaines_2E
Posts: 47
Joined: Mon Nov 18, 2019 12:18 am

Re: Calculating K

Postby WGaines_2E » Tue Mar 10, 2020 9:26 pm

K is a ratio, and ratios have no units

Astrid Lunde 1I
Posts: 103
Joined: Sat Sep 07, 2019 12:16 am

Re: Calculating K

Postby Astrid Lunde 1I » Tue Mar 10, 2020 10:05 pm

K has no units because it is a ration.


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