## Q vs K

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Cecilia Jardon 1I
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Joined: Fri Sep 28, 2018 12:16 am

### Q vs K

Is Q just the calculation of a reaction that has not yet reached equilibrium?

Kate Chow 4H
Posts: 61
Joined: Fri Sep 28, 2018 12:28 am

### Re: Q vs K

Q is just a calculation of equilibrium at a certain point within the reaction. Q changes as the reaction shifts towards equilibrium. However, Q = K at equilibrium.

004932366
Posts: 31
Joined: Wed Nov 22, 2017 3:00 am

### Re: Q vs K

The same method of calculating K is used to calculate Q. Q, the reactant quotient, is different from K when the reaction has not reached equilibrium, and depending on how much larger of smaller Q is from K, one is able to tell whether the forward or backwards reaction is favored. Like what the person before said, Q=K when the reaction is at equilibrium. If Q<K at some point during the reaction (when Q is calculated), the forward reaction is favored. If Q>K at some point in the reaction, the reverse reaction is favored.

405112316
Posts: 62
Joined: Fri Sep 28, 2018 12:17 am

### Re: Q vs K

Q and K and calculated the same exact way: concentration of products over concentration of reactants. However, Q calculates the status of a reaction when it is not in equilibrium; the purpose is to understand what direction the reaction is currently moving in.

Lumbini Chandrasekera 1B
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

### Re: Q vs K

Q CAN be at equilibrium or it can't. It's simply meant to describe the state of the reaction to compare to K value of the reaction at equilibrium to see where that reaction is sitting.

MadisonB
Posts: 63
Joined: Fri Sep 28, 2018 12:19 am

### Re: Q vs K

Simply put, Q is at any moment and K is when in equilibrium. Q can be used to show change.

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