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May 7, 2015

Homework Help: chem

Posted by JP on Monday, April 16, 2007 at 5:00pm.

The equilibrium constant Kc equals 5.90 for the reaction

CH3COOH + C2H5OH <==> CH3COOC2H5 + H2O

Find the molar concentrations of acetic acid, ethanol, ethyl acetate, and water at equilibrium when .10 M acetic acid and .20 M ethanol are allowed to equilibrate.

I started like this:
I assumed 1 L of solution so I had
.10 mol CH3COOH
.20 mol C2H5OH

and in terms of moles at equilibrium...
CH3COOH= a - x
C2H5OH= b - x
CH3COOC2H5= c + x
H2O= d + x
where a, b, c, and d = moles initially, and x= moles lost

But I'm not really sure where to go from here. Any help would be much appreciated.

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