Question Regarding K and Q






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Peter2715
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Question Regarding K and Q

Postby Peter2715 » Wed Jan 27, 2016 1:35 pm

For the formula Delta G = Delta G Nought + RTlnQ could someone help clarify the difference between the constants K and Q? since they are supposed to represent (Conc. of Products) / (Conc. of Reactants) right?

PaigeBlack
Posts: 32
Joined: Fri Sep 25, 2015 3:00 am

Re: Question Regarding K and Q

Postby PaigeBlack » Wed Jan 27, 2016 2:55 pm

K represents ratio of products over reactants when the reaction is at equilibrium while Q represents this ratio at any time during the reaction, not necessarily at equilibrium.

TeaK1C
Posts: 17
Joined: Fri Sep 25, 2015 3:00 am

Re: Question Regarding K and Q

Postby TeaK1C » Fri Jan 29, 2016 2:59 pm

The person above is correct, K is the ratio of products/reactants when the equation is currently at equilibrium. Q is used at any point of the reaction to figure out if you are at equilibrium or if you need to add more of something or reduce part of the reaction.


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