Reaction Quotient Q

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Kennedi2J
Posts: 101
Joined: Wed Sep 18, 2019 12:20 am

Reaction Quotient Q

Postby Kennedi2J » Sun Jan 12, 2020 6:24 pm

How do we distinguish when to calculate Q instead of K or vice versa?

sbeall_1C
Posts: 109
Joined: Sat Sep 07, 2019 12:17 am
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Re: Reaction Quotient Q

Postby sbeall_1C » Sun Jan 12, 2020 6:25 pm

Q is calculated when an equation is not at equilibrium, whereas K uses equilibrium values!

TarynD_1I
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: Reaction Quotient Q

Postby TarynD_1I » Sun Jan 12, 2020 6:26 pm

We use the reaction quotient Q when the reaction is not in equilibrium, to figure out which way the reaction shifts. Use K when the reaction is at equilibrium.

Samuel G Rivera - Discussion 4I
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Joined: Sat Aug 17, 2019 12:16 am
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Re: Reaction Quotient Q

Postby Samuel G Rivera - Discussion 4I » Sun Jan 12, 2020 6:50 pm

I believe the question you are working on will usually tell you whether you are finding Q or K. From the problems I've done, you are often given a K value at the beginning and are told to find Q in order to compare it to K.

AveryAgosto
Posts: 76
Joined: Wed Sep 18, 2019 12:16 am

Re: Reaction Quotient Q

Postby AveryAgosto » Sun Jan 12, 2020 6:52 pm

You are usually told which variable you are looking for but I believe Q is found when the reaction is not at equilibrium and K is found when the reaction is at equilibrium.

Sydney Pell 2E
Posts: 100
Joined: Wed Sep 11, 2019 12:17 am

Re: Reaction Quotient Q

Postby Sydney Pell 2E » Sun Jan 12, 2020 7:14 pm

Both Q and K are calculated the same way. Both are the concentration of the products over the concentration of the reactants. K is that value when the reaction is at equilibrium and Q is that value at any other time.

Karina Kong 2H
Posts: 98
Joined: Thu Jul 25, 2019 12:16 am

Re: Reaction Quotient Q

Postby Karina Kong 2H » Sun Jan 12, 2020 10:55 pm

Q is used when the equation is not at equilibrium. We can use Q to determine whether or not the equation will favor the reactants or products.


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