Kc vs K

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Rita Chen 1B
Posts: 112
Joined: Sat Jul 20, 2019 12:15 am

Kc vs K

Postby Rita Chen 1B » Mon Jan 20, 2020 3:41 pm

Whats the difference between Kc and K?

Robin Cadd 1D
Posts: 113
Joined: Thu Jul 11, 2019 12:16 am

Re: Kc vs K

Postby Robin Cadd 1D » Mon Jan 20, 2020 3:45 pm

K refers to the equilibrium constant. Kc is the equilibrium constant calculated by using concentrations. Basically, Kc is a subset of K.

Rita Chen 1B
Posts: 112
Joined: Sat Jul 20, 2019 12:15 am

Re: Kc vs K

Postby Rita Chen 1B » Mon Jan 20, 2020 3:49 pm

So when do we use K and when do we use Kc? When will we need to convert and how do we convert it?

Eunice Nguyen 4I
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

Re: Kc vs K

Postby Eunice Nguyen 4I » Mon Jan 20, 2020 3:51 pm

Rita Chen 1B wrote:So when do we use K and when do we use Kc? When will we need to convert and how do we convert it?

You use Kc when dealing with molar concentrations when you're figuring out the equilibrium constant. You don't really convert between K and Kc, because as the previous answer stated, Kc is basically a subset of K.

Rita Chen 1B
Posts: 112
Joined: Sat Jul 20, 2019 12:15 am

Re: Kc vs K

Postby Rita Chen 1B » Mon Jan 20, 2020 3:52 pm

But what if the Kc and K are different? Will we usually be given K or Kc depending on which one we use?

stephaniekim2K
Posts: 79
Joined: Fri Aug 09, 2019 12:16 am

Re: Kc vs K

Postby stephaniekim2K » Tue Jan 21, 2020 1:35 am

Kc is the equilibrium constant that's calculated by the concentrations but it is calculated the same way as just "K."

Sam McNeill 1E
Posts: 110
Joined: Sat Aug 24, 2019 12:17 am

Re: Kc vs K

Postby Sam McNeill 1E » Tue Jan 21, 2020 10:25 am

I was confused on this as well, the textbook made it seem like there were different values for K and Kc?

Kaylee Clarke 1G
Posts: 103
Joined: Fri Aug 30, 2019 12:15 am

Re: Kc vs K

Postby Kaylee Clarke 1G » Tue Jan 21, 2020 11:27 am

K is indicative of equilibrium and can be used with many subscripts. So, K can be applied to many equilibrium forms but Kc is simply the equilibrium constant.


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