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### Kc vs K

Posted: Mon Jan 20, 2020 3:41 pm
Whats the difference between Kc and K?

### Re: Kc vs K

Posted: 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.

### Re: Kc vs K

Posted: 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?

### Re: Kc vs K

Posted: 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.

### Re: Kc vs K

Posted: 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?

### Re: Kc vs K

Posted: 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."

### Re: Kc vs K

Posted: 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?

### Re: Kc vs K

Posted: 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.