Re: Q and Ke: Small K value and Large K value

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Elizabeth Harty 1A
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Joined: Sat Jul 20, 2019 12:16 am

Re: Q and Ke: Small K value and Large K value

Postby Elizabeth Harty 1A » Wed Jan 08, 2020 3:09 pm

What exactly is the reaction quotient?

Cooper Baddley 1F
Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

Re: Q and Ke: Small K value and Large K value

Postby Cooper Baddley 1F » Wed Jan 08, 2020 3:19 pm

The reaction quotient or Q is the ratio of the products over the reactants at whatever time you calculated the concentrations at. We then compare this ratio to the known K value or equilibrium constant to see if the reaction is still going and in what direction.

Madeline Phan 1E
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Joined: Sat Aug 17, 2019 12:18 am

Re: Q and Ke: Small K value and Large K value

Postby Madeline Phan 1E » Wed Jan 08, 2020 4:10 pm

Q is the value of products over reactants at any given time in the equation. K is the value of products over reactants when the reaction has reached equilibrium.

Kayli Choy 2F
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Joined: Sat Aug 24, 2019 12:17 am

Re: Q and Ke: Small K value and Large K value

Postby Kayli Choy 2F » Thu Jan 09, 2020 10:26 am

The reaction quotient, Q, is calculated in the same way in which K is calculated. If Q < K, the reaction is proceeding forward, toward products. If Q > K, the reaction is proceeding in reverse, toward reactants.

505316964
Posts: 95
Joined: Thu Jul 11, 2019 12:17 am

Re: Q and Ke: Small K value and Large K value

Postby 505316964 » Thu Jan 09, 2020 11:29 am

If Q is less than K this tells you that products still need to form, so the reaction will go forward.
If Q is greater than K it tells you that there are more products and the reaction must go back towards the reactants.

Vinita Saxena 2I
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Joined: Fri Aug 09, 2019 12:16 am

Re: Q and Ke: Small K value and Large K value

Postby Vinita Saxena 2I » Thu Jan 09, 2020 11:40 am

Q changes based on where the reaction is, whereas K does not change except when temperature changes.

504939134
Posts: 103
Joined: Wed Sep 18, 2019 12:21 am

Re: Q and Ke: Small K value and Large K value

Postby 504939134 » Thu Jan 09, 2020 2:22 pm

The reaction quotient is the amount of products over reactants at any time during the Rxn, it is calculated the same way as K but it is not at equilibrium.

pmokh14B
Posts: 107
Joined: Sat Aug 17, 2019 12:15 am

Re: Q and Ke: Small K value and Large K value

Postby pmokh14B » Thu Jan 09, 2020 2:48 pm

the reaction quotient is basically the equilibrium constant at a moment where the reaction is not at equilibrium. It can provide insight into which direction the reaction will proceed.


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