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### Calculating Q

Posted: 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?

### Re: Calculating Q

Posted: Sun Jan 13, 2019 7:19 pm
When calculating both Q or R you put the products over the reactants.

### Re: Calculating Q

Posted: 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.

### Re: Calculating Q

Posted: Sun Jan 13, 2019 7:24 pm
Okay, thanks guys! It confused me on problems like 5.1.9.

### Re: Calculating Q

Posted: 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.

### Re: Calculating Q

Posted: 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.

### Re: Calculating Q

Posted: Sun Jan 13, 2019 7:39 pm
Q is calculated the same way as K, so you will always have products over reactants

### Re: Calculating Q

Posted: Sun Jan 13, 2019 8:10 pm
when calculating either K or Q, you always have to put [products]/[reactants]