## Q vs K

Donna Nguyen 2L
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

### Q vs K

What's the difference between Q and K? Or, how are they similar?

Diana_Diep2I
Posts: 130
Joined: Sat Aug 17, 2019 12:17 am

### Re: Q vs K

Q is for when the reaction isn't at equilibrium. K is for when the reaction is at equilibrium.

ng1D
Posts: 43
Joined: Wed Sep 18, 2019 12:17 am

### Re: Q vs K

Q and K are similar in that they are calculated in the same way, Q = [P]/[R] and K = [P]/[R].

WesleyWu_1C
Posts: 117
Joined: Thu Jul 25, 2019 12:16 am

### Re: Q vs K

The difference between Q and K is that K is the equilibrium constant which in other words is when the reaction has reached equilibrium. Q, the reaction quotient, is something you can do during anytime of the reaction. By comparing Q to K, you can see the direction of the reaction. If Q=K, then you know equilibrium has been reached.

Kayli Choy 2F
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

### Re: Q vs K

- Q<K, the reaction will proceed forward to create more products
- Q>K, the reaction will proceed in reverse to create more reactants

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

### Re: Q vs K

Q and K are essentially the same when it comes to calculating them. The difference is that K is the value when the reaction is at equilibrium while Q can be found at anytime during the reaction to see if the action is at equilibrium or not.

Can someone please explain to me how to ask a question on Chem Community. I cannot figure it out. Thanks

805329408
Posts: 49
Joined: Wed Nov 20, 2019 12:21 am

### Re: Q vs K

The reason why the reaction moves forward when the reaction quotient (Q) is less than the equilibrium constant (K) is because the lesser value means that there is less product than there should be when the reaction reaches equilibrium and thus more product is needed, so the reaction moves forward. As for when Q is greater than K, the reaction moves in the reverse direction because there is now more product than there is at equilibrium and thus you need to move backwards.

504939134
Posts: 103
Joined: Wed Sep 18, 2019 12:21 am

### Re: Q vs K

Q is not at equilibrium, it is just products over reactants at any given time during the reaction. K is the equilibrium constant of the products over her reactants.