## eq constant

$PV=nRT$

ursulavictorino1K
Posts: 55
Joined: Sun Feb 17, 2019 12:15 am

### eq constant

Why do we ignore the terms that are solids when calculating the eq. constat? Why does it not have an effect on the concentration?

Ryan Yoon 1L
Posts: 55
Joined: Mon Jul 01, 2019 12:15 am

### Re: eq constant

We ignore the terms that are solids when calculating the equilibrium constant because solids do not have concentration. Since it does not have a concentration, it can not be implemented in solving for the Reaction Quotient, Q, or Equilibrium constant, K.

Janet Nguy 2C
Posts: 115
Joined: Sat Aug 24, 2019 12:17 am

### Re: eq constant

My TA said that the activity of solids and liquids are essentially equal to 1, so when calculating the equilibrium constant solids and liquids do not matter because all the units are essentially dealing with the activity of a species.

haileyramsey-1c
Posts: 105
Joined: Thu Jul 25, 2019 12:18 am

### Re: eq constant

Solids and liquids are not included in the reaction quotient because at equilibrium they do not affect the reactant amount. Their activity in the reaction is 1.

205405339
Posts: 77
Joined: Thu Jul 11, 2019 12:16 am

### Re: eq constant

Essentially solids and liquids are in such great excess and it is impossible to come up with a value for their concentration hence why they are omitted