Calculating Q

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kanikubari
Posts: 30
Joined: Fri Dec 07, 2018 12:18 am

Calculating Q

Postby kanikubari » Sun Jan 13, 2019 7:17 pm

I don't know if this has been asked already but when finding Q, how do you know when to put the reactant on top of the fraction or the product?

beckyolmedo1G
Posts: 34
Joined: Fri Sep 28, 2018 12:21 am

Re: Calculating Q

Postby beckyolmedo1G » Sun Jan 13, 2019 7:19 pm

When calculating both Q or R you put the products over the reactants.

caseygilles 1E
Posts: 73
Joined: Fri Sep 28, 2018 12:18 am

Re: Calculating Q

Postby caseygilles 1E » Sun Jan 13, 2019 7:20 pm

We calculate Q the exact same way we calcuate Kc or Kp, that is
Kc= [products]^a/[reactants]^b
Kp= (P products)^a / (P reactants)^b
The products are always in the numerator.

kanikubari
Posts: 30
Joined: Fri Dec 07, 2018 12:18 am

Re: Calculating Q

Postby kanikubari » Sun Jan 13, 2019 7:24 pm

Okay, thanks guys! It confused me on problems like 5.1.9.

Dong Hyun Lee 4E
Posts: 68
Joined: Fri Sep 28, 2018 12:23 am

Re: Calculating Q

Postby Dong Hyun Lee 4E » Sun Jan 13, 2019 7:31 pm

Calculating Q and K are the same. Q is just when the equation is not at equilibrium so you compare that value to K in order to figure out which direction the reaction is going. To calculate Q or K you need to do products over reactants.

Mercan Bayazit 4E
Posts: 18
Joined: Fri Sep 28, 2018 12:20 am

Re: Calculating Q

Postby Mercan Bayazit 4E » Sun Jan 13, 2019 7:36 pm

When calculating both Q and K we put the products over the reactants, so it is the same as K.

Mikka Hoffman 1C
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am
Been upvoted: 2 times

Re: Calculating Q

Postby Mikka Hoffman 1C » Sun Jan 13, 2019 7:39 pm

Q is calculated the same way as K, so you will always have products over reactants

204929947
Posts: 76
Joined: Fri Apr 06, 2018 11:03 am

Re: Calculating Q

Postby 204929947 » Sun Jan 13, 2019 8:10 pm

when calculating either K or Q, you always have to put [products]/[reactants]


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