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Equilibrium

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Equilibrium

Postby hannahzarzar » Sun Jan 16, 2011 3:44 pm

In a series of reactions, A → B → C → D, it was determined that the equilibrium constant for the second reaction (B → C) is 0.1. You would expect the concentration of C in a living cell to be: (1) equal to B; (2) one tenth of B; (3) less than one tenth; (4)ten times that of B; (5) more than ten times of B. (Circle any correct answer).

In my opinion, the answer would be 3 because there are still more stages that need to bring the reaction to equilibrium. Is that right???
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Postby JackBean » Sun Jan 16, 2011 6:03 pm

if is there equilibrium and no other reactions, it should be 2
http://www.biolib.cz/en/main/

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Re: Equilibrium

Postby jonmoulton » Mon Jan 17, 2011 5:11 pm

But this is a living cell, and so it is not at equilibrium [ Jack, you tricky guy -- making a student THINK ;) ]
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Postby JackBean » Mon Jan 17, 2011 10:06 pm

well, even in the tube the equilibrium doesn't mean there's no reaction
http://www.biolib.cz/en/main/

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Re: Equilibrium

Postby hannahzarzar » Mon Jan 17, 2011 11:41 pm

The question mentions that there are a series of reactions - A thru D. It mentions that B is 0.1. Doesn't the equation have to total 1 in order to have equilibrium?
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Postby JackBean » Tue Jan 18, 2011 6:35 am

no, only for the particular reactions
http://www.biolib.cz/en/main/

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Re: Equilibrium

Postby hannahzarzar » Thu Jan 20, 2011 4:00 pm

So, how am I to know how to calculate the answer? I'm totally lost on this question.
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Postby JackBean » Fri Nov 25, 2011 2:12 pm

the equilibrium constant is calculated as follows: K = [product]/[substrate], thus, if K = 0.1 = [product]/[substrate] -> [substrate] = 10[product]
http://www.biolib.cz/en/main/

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