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Topic: Equilibrium Concentration??  (Read 5902 times)

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Offline mstrrogers

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Equilibrium Concentration??
« on: February 25, 2009, 10:27:02 PM »
Pyrophosphatase catalyzes the hydrolysis of PPi.  The equilibrium constant for the
pyrophosphatase reaction is 1720 M.  The cellular concentration of Pi is 7.9 mM.  What
is the concentration of PP when the pyrophosphatase reaction is at equilibrium?
 

WHERE TO START????
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Offline mstrrogers

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Re: Equilibrium Concentration??
« Reply #1 on: February 25, 2009, 11:00:42 PM »
Quote from: mstrrogers on February 25, 2009, 10:27:02 PM
Pyrophosphatase catalyzes the hydrolysis of PPi.  The equilibrium constant for the
pyrophosphatase reaction is 1720 M.  The cellular concentration of Pi is 7.9 mM.  What
is the concentration of PP when the pyrophosphatase reaction is at equilibrium?
 

WHERE TO START????

is the answer 1.8 x 10^4
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Offline Yggdrasil

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Re: Equilibrium Concentration??
« Reply #2 on: February 26, 2009, 12:20:25 AM »
No.  If the equilibrium constant is 1720M, do you expect the concentration of reactant to be higher than the concentration of the product?

Start by writing a balanced chemical reaction for the hydrolysis of pyrophosphate and then write the expression from the equilibrium constant.
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